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Carlos collecting Quercus ×alentejana (Q. faginea × Q. pyrenaica) in northeastern Portugal for his PhD thesis © Carlos Vila-Viçosa
An interview with Portuguese oak conservationist Dr. Carlos...
Amy Byrne | Apr 19, 2024
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Roderick Cameron | Apr 13, 2024
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It was a great pleasure for me to be able to write about my...
Gert Fortgens | Feb 15, 2024

Plant Focus

Quercus crassipes acorns with inrolled cupule margin
One of the more well-known Mexican oaks in cultivation.

Oaks on Postage Stamps

The late Stelian Radu, one of the early members of the IOS, wrote an article in International Oaks No. 3 (1993) about postage stamps that featured oaks: "The Oaks in Philately." It was based on his own collection, which focused on stamps related to trees and forests, and it included some illustrations in black and white. I thought it might be interesting to update the article to include other stamps with oaks, using the research capabilities that the internet now offers, and to illustrate them with color reproductions. The project became a bit of a rabbit hole, as it turns out that in addition to the stamps that Stelian had not included, a large number of countries have issued oak-related stamps since he wrote the article. It might be easier to list the countries that haven't done so! You can see the result of the research below.

I found over 100 (see Update below) stamps that prominently featured an oak tree, oak leaves, or acorns. As might be expected, Quercus robur is by far the most philatelic oak, chosen by many European countries. But there are some interesting rarities: kudos to Costa Rica for putting the rare Q. brenesii on a stamp; a few countries have highlighted their endemic species, or at least species that would be endemic or nearly so before they were synonymized; Germany issued two poignant post-war stamps in which oaks eloquently symbolize the hope of new beginnings; an oak cultivar has made it on to a stamp (issued by Belgium, of course); and surely the prize for rarity goes to Abkhasia, who put two oak fossils on their stamps. Interesting to note that countries in oak diversity hot spots like Mexico, China, and South East Asia are surprisingly absent. 

If you know of any that I have missed, click here to let me know, or if you are an IOS member you can log in and post a comment below.

Update (April 2024)

In January 2024 a friend who had read this blog presented me with a stamp album containing a large number of stamps featuring oaks. It was a beautiful gift, and it has spurred me to start collecting the stamps mentioned in this post (further cause for perdition, as if collecting oak trees were not enough!). It also led me to intensify the search for stamps that include oaks (or parts thereof, e.g., acorns, leaves, bark, etc.), and there were quite a few more that turned up. I have added a further 80 or so stamps, bringing the total to over 180. Worthy of note is what is surely the most quercine stamp, consisting of part of an oak: issued by Portugal, it is made of a wafer or cork (the bark of Q. suber). Austria also issued a stamp made of wood, cut out in the shape of an oak tree, but there is no indication that the wood used was oak. Also interesting is the series of stamps issued to commemorate Christmas by several countries in different years, all based on the Renaissance painting The Holy Family Under the Oak Tree (see Antigua and Barbuda, Benin, Grenada, New Zealand, and Uganda). I have not been able to find an explanation for the repetition.

 

Abkhasia

This de facto state in the South Caucasus, recognized by most countries as part of Georgia, is the only country to put Quercus fossils on their stamps: Q. kodorica and Q. sosnowskyi, both described by Georgian/Russian (Soviet) paleobotanist Alfred Alekseevich Kolakovsky (1906–1997).

Quercus kodorica
Quercus sosnowskyi

Algeria

Issued as part of a series of four stamps commemorating the International Year of Forests - Fruits and Nuts (2011), this stamp bears images of Q. suber.

Cork oak Algeria

Antigua and Bermuda

A Christmas 2014 stamp based on The Holy Family Under the Oak Tree, a Renaissance painting said to have been completed by RedGiulio Romano (1499–1546), using a composition or underdrawing by Raphael (1483–1520); on the stamp it is attributed to Raphael. The oak in the background appears to be Q. petraea (rounded lobes, long petioles).

Holy Family below the Oak

Argentina

Issued in 1948 to commemorate the bicentenary of postal service in Río de la Plata (River Plate). It is not clear why a twig of Q. robur is included.

Holy Family below the Oak

Armenia

A 1995 stamp shows a red Kite (Milvus milvus) perched on a branch of Q. araxina (a synonym of Q. infectoria subsp. veneris, originally described as a variety of Q. robur found in Armenia).

Red Kite and Quercus araxina

Austria

A laser cut wooden stamp issued in 2017, depicting an oak of indeterminate species.

Red Kite and Quercus araxina

Belarus

Quercus robur (in Belarussian дуб звычайны - dub zvyčajny) is featured in this stamp issued in 2004. 

Oak stamp Belarus

Belgium

The only stamp to feature an oak cultivar, Q. 'Pondaim', a selection of the hybrid Q. dentata × pontica.

Quercus Pondaim Belgium

From a series on Tree Fruits and Nuts issued in 2021, this stamp features Q. robur (zomereik in Flemish and Chêne pedunculé in French).

Zomereik Belgium

An oak (species not specified) is featured on this stamp issued in 2009, part of a series on Forest Trees.

Eik Belgium

Benin

A Christmas 1996 stamp based on the painting The Holy Family under an Oak Tree, said to be based on a composition and first sketch by Raphael (1483–1520) and completed by Giulio Romano (1499–1546); on the stamp it is attributed to Raphael (Rafael Sanzio). Difficult to make out the oak in the stamp, but it is clear in the painting (see here), apparently Q. petraea. 

Quercus cerris Bosnia Herzegovina

Bosnia & Herzegovina

Quercus cerris (hrast cer), issued in 2013, Croatian administration, part of a series of Myths and Flora.

Quercus cerris Bosnia Herzegovina

Quercus sessilis (a synonym of Q. petraea), issued in 2000, Croatian administration, part of a series of Flora of Bosnia and Herzegovina.

Oak BosniaHerzegovina

Part of a series on Old Slavic Sacred Trees, this stamp features Q, robur, identified only as Quercus (hrast).

Oak Bosnia Herzegovina Serbian admin

Brazil

Issued to commemorate the Constitution of 1946, the stamp depicts a woman's head with a Phrygian cap and an oak branch, perhaps Q. robur.

1946 constitution Brazil

Bulgaria

Quercus robur, apparently 800 years old, featured in a 1964 stamp, part of a series on trees.

Quercus robur Bulgaria

Two stamps featuring species endemic to Bulgaria Q. thracica (considered a synonym of Q. cerris) and Q. mestensis (a synonym of Q. robur subsp. pedunculiflora), part of 1992 series of four Endemic Trees of Bulgaria.

Quercus thracica
Quecus mestensis

Canada

Quercus rubra on a stamp issued in 1978, as part of a series featuring leaves of six Canadian trees.

Quercus rubra

Cook Islands

A Christmas 1975 stamp based on a Renaissance painting said to be completed Giulio Romano (1499–1546), using a composition or underdrawing by Raphael (1483–1520); on the stamp it is attributed to Raphael. The oak in the background appears to be Q. petraea (rounded lobes, long petioles).

Holy Family below the Oak

Costa Rica

Issued in 1976 as part of a series commemorating the centenary of Costa Rican botanist Prof. Alberto Manuel Brenes Mora. The stamp features the rare Q. brenesii, native to Costa Rica and also found in Mexico (Veracruz) and Nicaragua; the series included four other plants named in honor of Brenes Mora..

Quercus brenesii

Croatia

A series of three stamps issued in 2002 featured Q.ilex (crnika), Q. petraea (kitnjak), and Q. robur (lužnjak).

Quercus ilex, petraea, robur

Cyprus

Quercus alnifolia, the golden oak of Cyprus, featured on a stamp issued in 1994, part of a series of four trees of Cyprus. The stamp includes the local name, λατζιά, which has an interesting derivation: from Υλάτης (Hylates), an epithet attributed by the ancient Cypriots to the Greek god Apollo, Apollo Hylates, i.e., ‘Apollo who lives in the forest’, from ὕλη (hyle) = ‘forest’.

Querucs alnifolia

Czechia (Czech Republic)

Part of a series on Protected Trees issued in 2004, the stamp shows Žižka's Oak (Žižkův dub) in Podhradí near Lichnice, Chrudim Region, thought to be some 900 years old. The current girth and height of the tree (Q. robur) are 9.20 and over 18 m, respectively. The tree was possibly named after the famous Hussite commander Jan Žižka for its perseverance to keep standing and fight.

Zizkia Oak

One of three stamps issued in a series named Protection of Nature: Trees (1993); Q. robur.

Pedunculate oak Czech Rep

Denmark

Issued in 1999 as apart of a series featuring four deciduous trees: oak (eg), Q. robur.

Quecus robur Denmark

Djibouti

Part of a 2022 series depicting mushrooms. This one features Daedalea quercina (oak mazegill), which frequently grows on oaks (hence the epithet), so it is safe to assume that the trees shown in the stamps are a species of oak, but difficult to determine the species.

Quecus robur Denmark

Estonia

A stamp issued in 2008 to commemorate the 90th Anniversary of the Republic of Estonia shows a stylized Q. robur with disproportionately large leaves.

Quercus robur Estonia

 

Finland

Quercus robur, issued in 1991 as part of a series on regional fruiting trees.

Quercus robur Finland

France

Quercus robur (chêne pedunculé), part of a series of 10 trees from around the world, issued in 2018.

Quercus robur France

A 2011 stamp depicting inhabitants of the forest, including an oak represented by a leaf (Q. robur based on the shape of the base) borne on a trunk.

Les forets

A personalized stamp issued in 2011, featuring the Forest of Tronçais (see below)

Foret de Troncais

A personalized stamp issued in 2010, apparently depicting an oak forest.

Quercus robur France

Oak leaves (chêne, species not specified), part of a series of eight stamps featuring tree leaves, issued in 1994.

Oak leaf France

One of a series of 10 stamps entitled "Flora", issued in 1985: Q. pedunculata (a synonym of Q. robur).

Quercus robur France

A 1976 stamp commemorating the Forest of Tronçais, a national forest comprising 10,600 hectares in the Allier department of central France. Its oaks (Q. petraea), planted by Louis XIV's minister Jean-Baptiste Colbert to supply the French Navy, constitute one of the principal stands of oaks in Europe.

Foret de Troncais

German Realm (Deutsches Reich)

Issued in 1942 to commemorate Heroes Memorial Day (Heldengedenktag), the stamp shows the head of a soldier, a helmet and a sprig of oak leaves (Q. robur?).

Head of dead soldier, oak wreath

Two 1935 stamps feature a fist brandishing an oak (Q. robur) over a swastika.

Fist, oak wreath, swastika
Head of dead soldier, oak wreath

A common stamp issued by the German Realm showed a swastika in an oak wreath. Some 14 stamps of different values and colors were issued between 1934 and 1942.

3 Swastika Oak Wreath

4 Swastika Oak Wreath 5 Swastika Oak Wreath 5a Swastika Oak Wreath 6 Swastika Oak Wreath

8 Swastika Oak Wreath

10 Swastika Oak Wreath 12 Swastika Oak Wreath 15 Swastika Oak Wreath 20 Swastika Oak Wreath
30 Swastika Oak Wreath 40 Swastika Oak Wreath 50 Swastika Oak Wreath 50a Swastika Oak Wreath  

Germany

Part of series of four stamps depicting the four seasons, issued in 2006. The stamp for winter features a Q. robur located in the State Domain Beberbeck near Hofgeismar, Kassel. Click here to view Eike Jablonski's photo of the oak, taken in 2018.

Quercus robur German

Issued to commemorate the opening of the National Assembly, Weimar in 1919. The image shows new shoots sprouting from an oak stump, symbolic of new government. The species appears to be Q. robur.

Quercus petraea Germany

Issued in 1945 by Berlin and Brandenburg (Soviet Occupation zone), the stamp shows an oak seedling (probably Q. petraea) planted amid the ruins of Berlin.

Stadt Berlin 1945

Issued in 1958 to mark the 150th anniversary of the German Gymnastics Movement, the stamp features the gymnastic cross in an oak leaf.

Gymnastic cross in oak leaf

Part of a four-stamp series of Forest Fruits, issued in 1979: Q. robur (Stieleiche).

Steileiche

Grenada

A stamp issued in 2000 depicts the fungus Daedalea quercina (oak mazegill) grown on the trunk of an oak.

Rocks with Oak Tree

Also issued in 2000, another stamp featuring the painting The Holy Family Under the Oak Tree by Raphael and Giulio Romano (see Antigua and Barbuda, above), which hangs in The Prado Museum in Madrid.

Holy Family Under the Oak TGree

One of a series of 17 stamps issued in 1991, featuring paintings by Vincent Van Gogh; this stamp shows his Rocks with Oak Tree, painted in 1888.

Rocks with Oak Tree

Grenada Grenadines

Issued by the Grenadine Islands belonging to Grenada, this 1998 stamp shows a detail of Eugène Delacroix's painting Forest View with an Oak Tree.

Forest View with an Oak Tree

Guernsey

An island in the English Channel off the coast of Normandy, Guernsey is part of the Bailiwick of Guernsey, a British Crown Dependency. This stamp is part of a 2011 PostEuropa issue, featuring three forest trees and their fruit. It shows a Q. robur acorn.

Quercus robur acorn

Issued in 1975, this stamp shows an oak tree planted in Hauteville House by Victor Hugo during his exile in Guernsey. His hope was that by the time the tree had reached maturity a United States of Europe would be a reality. Part of a series of four stamps entitled Souvenir of Victor Hugo's Exile in Guernsey (1855–1870),

Hauteville Oak

Hungary

A stamp issued in 1982 issued to commemorate the 200th anniversary of the Diósgyör Paper Mill. The image shows an oak leaf and acorns and leaves of another tree (linden (Tilia)?). The mill's current logo appears to show the same motif. The oak has the acorn stalks of Q. robur, but the leaf base of Q. petraea. Might it be Qrosacea?

Quercus rosacea Hungary

A 1976 stamp commemorating the afforestation of the millionth hectare. It shows a map of Hungary with wooded areas highlighted, and leaves of forest trees including oak (Q. petraea).

Afforestation millionth hectare
 

Ireland

One of a series of four stamps of trees of Ireland issued in 2006. It shows Q. petraea (dair ghaelach), Ireland's national tree.

Quercus petraea Ireland

Israel

Quercus ithaburensis (Mount Tabor oak) is featured in this stamp issued in 2018, as one of a series of three named Trees of Israel. 

Quercus ithaburensis

Quercus ithaburensis was also chosen for one of the stamps in a 1981 series named Trees of the Holy Land.

Quercus ithaburensis Israel

Italy

One of a series of 17 stamps issued in 1936 to commemorate two thousand years since the birth of Horace. Each of the stamps includes a quotation from the classical poet's work. This stamp depicts a Q. ilex (holm oak) and an eagle, with the inscription "duris ut ilex". The quotation is taken from Book IV of Horace's Odes. The passage from which it is taken reads:

Gens, quae cremato fortis ab Ilio
iactata Tuscis aequoribus sacra
     natosque maturosque patres
     pertulit Ausonias ad urbes,

duris ut ilex tonsa bipennibus
nigrae feraci frondis in Algido,
     per damna, per caedes ab ipso
     ducit opes animumque ferro. 

It has been translated by A.S. Kline as follows:

Their race, still strong despite the burning of Troy,
brought their children, sacred icons, and aged
fathers, tossed about on Tuscan seas,
to the towns of Italy, as some oak,

rich in its dark leaves, high on Mount Algidus,
trimmed back by the double-bladed axe, draws strength
and life, despite loss and destruction,
from the very steel itself. 

Duris ut ilex

Issued in 1958, this stamp commemorates the 10th anniversary of the Italian Constitution. It shows an oak (Q. petraea?) with a vigorous new shoot, symbolic perhaps of a new beginning.

Oak with new growth

Japan

Stamps issued on the occasion of the National Afforestation Ceremony successively in the 22nd, 23rd, and 25th years of the Heisei period (reign of Emperor Akihito).  

Quercus myrsinifolia
Q. myrsinifolia (2010)
Quercus serrata
Q. acutissima (2010)
Quercus gilva Japan
Q. gilva (2011)
Quercus serrata Japan
Q. serrata (2013)

One of a series of five stamps issued in 2023 commemorating Land Afforestation in Iwate Prefecture. It features leaves of several trees, including a section Quercus oak.

Afforestation Iwate Prefecture

One of five stamps issued in 2022 as part of a series entitled Land Afforestation in Shiga Prefecture. It depicts Q. acuta.

Quercus acuta Japan

Part of the Greetings - Autumn 2022 series, a stamp featuring a fruiting twig of an oak.

Autumn 2022 oak

Two stamps in the 2020 Autumn Motifs series feature oak leaves and acorns.

Autumn 2020 oak leaves
Autumn 2022 oak

A series called Greetings - Autumn 2020 includes stamps showing eight leaves, fruits, and nuts associated with autumn. They include an oak leaf that looks likes Q. dentata, and an acorn of an unspecified species (not from Section Cyclobalanopsis). The perforations follow the contour of each figure.

Quercus dentata
Acorn Japan

A 2019 series commemorating the 70th National Tree Planting Festival at the Aichi prefecture forest park includes a stamp depicting Q. mongolica.

Quercus mongolica

The 2019 Gifts from the Forest series includes two stamps featuring acorns: "Acorns and Pinecones" and "Acorns and Nuts".

Acorns and pinecones
Acorns and nuts

Two stamps in the 2019 Autumn Greetings series feature oak-related elements: a squirrel nibbling on an acorn, and nuts including what looks like a Q. acutissima acorn.

Squirrel and acorn
Acorn Japan

A 2017 series of Traditional Colors includes a stamp using oak leaves of three species to represent the color ocher.

Ochre oak leaves

A stamp in the 2014 Letter Writing Day series features acorns and chestnuts.

Acorns and chestnuts

A 1998 series issued to mark the International Letter Writing Week featured six paintings by Itō Jakuchū (1716–1800). One depicts a parakeet in a Japanese oak.

Parakeet in Japanese oak

Jersey

Quercus robur is the subject of two stamps issued by the largest of the Channel Islands, officially the Bailiwick of Jersey. The earlier one was issued in 1997 and the second in 2011, part of a PostEuropa issue.

Common oak Jersey
Quercus robur Jersey

Jordan

One of a series of three stamps of "perennial trees" of Jordan issued in 2003. It shows Q. aegilops, considered a synonym of Q. macrolepis (for some authors, Q. ithaburensis subsp. macrolepis).

Quercus aegilops Jordan

Part of a multi-country emission in 2017 featuring trees of the Mediterranean: Q. cerris. 

Quercus cerris Jordan

Latvia

Issued in 2005 as one of a series of stamps depicting Nature Monuments of Latvia, this stamp shows the Kaive Oak (Kaives dižozols, the giant oak of Kaive, a Q. robur) in Sēme Parish, Tukums Municipality, Latvia. In 2014 it had a girth of 10.4 m and a height of 18 m. It is reportedly the tree with the largest girth in the Baltic States and is protected as a natural monument in Latvia.

Quercus robur Latvia

A stamp issued in 1936 features a sprig of oak leaves (Q. petraea) and the symbol of the "White Cross Fund".

Oak leaves Latvia

A 1932 stamp depicts a Kriwe, an ancient pagan priest in the Baltic region, telling stories under a holy oak.

Oak leaves Latvia

Liechtenstein

One of a series of three stamps with trees issued in 1986. The species is not specified but could be Q. robur.

Oak Liechtenstein

Another series featuring trees was issued in 2016. Again, the species in question appears to be Q. robur, though no name is given on the stamp.

Quercus robur Liechtenstein

Lithuania

Issued in 1920 to commemorate the opening of Lithuanian National Assembly. It features a "sacred oak", presumably Q. robur. Three stamps were issued with different values: 1, 3, and 5 auksinas (a currency used in Lithuania from 1919 to 1922).

Sacred oak Lithuania
Sacred oak Lithuania
Sacred oak Lithuania

This stamp issued in 2010 features the Stelmužė Oak (Stelmužės ąžuolas), a Q. robur which grows in the former Stelmužė Manor park by Stelmužė village, Lithuania. The oak is 3.5 m in diameter and 13 m in girth at its widest part; and 2.8 m. and 9.58 m at waist level. The oak reaches 23 m in height with only side branches remaining alive. It is believed to be over 1,000 years old.

Quercus robur Lithuania

A 2016 stamp shows a Q. robur in Ąžuolynas ("oak grove"), a public park in Lithuania's second largest city, Kaunas.

Ąžuolynas Lithuania

Luxembourg

Part of a series of four indigenous trees issued in 1995, this stamp shows Q. pedunculata, a synonym of Q. robur.

Q. pedunculata

A 2017 series of three stamps depicting Luxembourg's Orders of Merit includes a stamp bearing the Ordre de la Couronne de Chêne (Order of the Oak Crown), which rewards outstanding civil and military services rendered by Luxembourg citizens as well as achievements of distinguished artists.

Order of the Oak Crown

Malta, Sovereign Military Order of

Issued in 2017, the stamp features a painting found in the Basilica of Santa Maria della Quercia (St. Mary of Oak Tree) in Viterbo, Italy, painted by the early 16th century artist Monaldo Trofi, known as Il Truffeta. The name of the Madonna derives from an icon that used to hand on an oak tree in the town.

Madonna della Quercia

Marshall Islands

Part of a 2014 series on Trees, the stamp features an oak of indeterminate species.

Q. robur Moldova

Moldova

A stamp issued in 2003 bears an oak hawk-moth (Marumba quercus, or Porumbacul stejarului in Moldovian), drawn on a background of oak leaves.

Oak Hawk Moth

The oak mushroom Boletus luridus (now Suillellus luridus), commonly known as the lurid bolete or hrib lurid in Moldavian, is shown on a 1995 stamp growing among oak leaves and acorns. It is one of a series of five stamps featuring mushrooms.

Boletus luridus

Issued in 2018 as part of a series featuring eight trees: Q. robur (stejar).

Q. robur Moldova

Morocco

Part of a joint emission in 2017 by several countries showing trees of the Mediterranean: Q. suber (chêne liège).

Quercus suber Morocco

Netherlands

One of a 2017 series of two stamps showing trees in summer: Q. robur.

Quercus robur Netherlands

New Zealand

Another stamp representing a detail of Raphael and Giulio Romano's The Holy Family Under the Oak Tree. Issued for Christmas 1983, this version is more stylized than those issued by other countries.

Holy Family Under the Oak Tree

North Korea

A series of stamps issued in 1991 commemorated sericulture (the production of raw silk by raising silkworms) and in particular Dr. Kye Ung Sang (1893 – 1967), a North Korean geneticist and expert on silkworms. One of the stamps features the Japanese Oak Silkmoth (Antheraea yamamai), whose larva mainly feed on Quercus species. Leaves and acorns of an oak are included in the stamp.

Quercus robur Latvia

North Macedonia

One of a 1998 series of two stamps commemorating Christmas. It shows a loaf of bread and oak leaves of an unspecified species with distinctly long petioles. Both items form part of traditional Christmas ceremonies in North Macedonia, the oak in the form of the Бадник (badnik) or Yule log, which is lit on Christmas Eve.

Bread and oak leaves

Part of a series issued in 2001 featuring four native trees of Macedonia, two of which are oaks: Q. coccifera and Q. macedonica (a synonym of Q. trojana).

Quercus coccifera
Quercus macedonica

Northern Cyprus

One of a series of two stamps issued in 2011 showing "hundred-year-old trees" (the other is an Olea europea): Q. infectoria. The subspecies that is found in Cyprus is known as Q. infectoria subsp. veneris, for some authors Q. boissieri. It is difficult to make out the text on the stamp in the low-resolution image available, but it appears to say "Quercus infectoria ssp. Cyprus Oak". Cyprus oak is one of the common names of this taxon, also known as Aleppo oak, gall oak, and dyer's oak.

Quercus infectoria

Poland

A stamp issued in 2013 commemorates 455 years of Polish Post. Designer Agnieszka Sancewicz chose the tree rings on the section of the trunk of an oak tree to symbolize the traditions and longevity of the institution. Also included is the outline of an oak leaf which disturbingly resembles an eastern North American species (Q. stellata? Q. macrocarpa?) rather than a species native to Poland. The stamp was voted "Most Beautiful Stamp" at the 44th International Philatelic Art Awards in Asiago (Italy) in 2014.

455-years-of-polish-post.jpg

Poland's other native oak, Q. petraea (dąb bezszypułkowy), is the subject of a stamp issued in 1995.

Quercus petraea

One of a series of six stamps issued in 1978 showing different tree species, under the title "Protection of the Environment": Q. robur (dąb szypułkowy).

Quercus robur Poland

 

Part of a series featuring Tourist Attractions, a 1966 stamp shows old oaks at Rogalin Landscpape Park. About 2,000 magnificent oaks are found on the banks of the river Warta near Rogalin, among numerous oxbow lakes. It is Europe's largest group of monumental oak trees. Their trunks reach a circumference of up to 9 meters, and all those reaching over 2 m in circumference are protected by law.

Rogalin Oaks Poland

Issued in 1964 to commemorate the 20th anniversary of the Polish People's Republic, the stamp features a stylized oak. Apparently.

Stylized Oak

The prisoner-of-war camp in Woldenberg, Poland, presently named Dobiegniewo, was the first POW camp to establish an internal postage system. The camp was named Oflag II C (Oflag - Offizier Lager- POW camp for officers only). One of their stamps issued in 1944 shows the stump of an oak, newly felled, with an axe wedged in it, with twigs of new growth sprouting behind. The image is presumably a symbol of regrowth following destruction. The leaves seem to be Q. petraea. Four stamps have the same design and different values: 10, 20, 30, and 40 German reichspfennig.

Liberty Oak
Liberty Oak
Liberty Oak
Liberty Oak

Another stamp issued in 1944 by the Woldenburg POW camp depicts the Piast Tower in Cieszyn and a spring of Q. petraea leaves and acorns.

Piast Tower

Portugal

Quercus suber (sobreiro) is featured on one of the stamps issued in 2017 as Portugal's contribution to the multi-country emission commemorating trees of the Mediterranean (Árvores do Mediterrâneo).

Quercus suber Portugal

In 2007 Correios de Portugal (Portuguese Postal Service) and the Portuguese Assembly of the Republic issued the world's first stamp made of cork. It was made entirely of self-adhesive cork paper, with a face value of 1 euro. It was designed by artist João Machado and celebrated the Portuguese cork sector, which has put Portugal at the forefront of world cork production and exports. The image shows a solitary Q. suber growing in an undulating landscape.

Stamp made of cork

A 1977 stamp shows the trunks of Q. suber stripped for cork.

Cork oaks stripped Portugal

Romania

 

A 1983 stamp celebrates the 65th anniversary of Romanian unification. Below a tri-color ribbon in the colors of the Romanian flag, with the country's coat of arms in the middle, sits a Q. petraea twig bearing two leaves and an acorn (the oak is Romania's national tree).

65th anniversary Romanian unification

To commemorate the 35th anniversary of the republic in 1982, Romania issued a stamp that shows the national flag above a fruiting twig of what appears to be Q. petraea.

romanian flag and oaks

One of a 1994 series of eight stamps showing trees: Q. robur.

Quercus robur Romania

Issued in 1956 as part of a series commemorating the Month of the Forest: Q. robur.

Quercus robur Romania

Russia

Issued in 2015 as one of four stamps in a series featuring trees: Q. robur (дуб черешчатый, dub chereshchatyy, "pedunculate oak").

Quercus robur Russia

San Marino

A 1999 series shows four examples of bonsai trees, one of them a Q. robur.

Quercus robur bonsai

Quercus pubescens is featured in a stamp from a 1997 series of four "Monumental Trees".

Quercus pubescens

One of five stamps in a Flora and Fauna series, the stamp features a garden dormouse (Eliomys quercinus) and Q. ilex.

Garden dormous and Q. ilex

São Tomé and Príncipe

Part of a four-stamp series of Mushrooms issued in 20187, the stamp features the mushroom Leccinum quercinum, now a synonym of L. aurantiacum (orange oak bolete). Also pictured is a red squirrel (Sciurus vulgaris) gnawing on a nut. The squirrel sits on a branch, which, based on the epithet of the mushroom and the presence of a squirrel, is most likely an oak. The mushroom is known to be associated with oak, but can also be found under poplar, aspen (Populus sp.), beech (Fagus sp.), or birch (Betula sp.).

Leccinum quercinum

Slovakia

One of a series of three stamps in a series issued in 1993 under the title "Protection of Nature": Q. robur.

Quercus robur Slovakia

Slovenia

Part of a series dedicated to Slovenians around the world, this 2020 stamp bears the legend "Slovenians in Germany" (Slovenci v Nemčiji) and bears stylized representations of Tilia platyphyllos (lipa) and Q. robur (hrast dob), presumably representing Germany and Slovenia.

Quercus robur and Tilia plathyphyllos

Soviet Union

Part of a 1980 series featuring "Protected Trees and Shrubs": Q. robur (дуб обыкновенный, dub obyknovénnyy, "common oak").

Quercus robur

Issued to commemorate the 150th birth anniversary of the painter Ivan Shishkin (1832–1898), this stamp shows his 1865 painting entitled Дуб (oak): Q. robur (probably).

Quercus robur USSR

One of five stamps in a 1988 series dedicated to the fountains of Petrodvorets (Петродворец), a former name for Petergof (Петерго́ф), a palace in St. Petersburg, famous for its fountains. The fountain depicted in the stamp is known as  дубок (dubok), meaning "oak seedling," and is one of the so called joke-fountains, in this case in the shape of a stylized young oak, presumably Q. robur or Q. petraea.

Dubok Russia

Spain

Issued in 1966 to commemorate the 600th anniversary of the city of Guernica. The stamp features the Árbol de Guernica (in Basque Gernikako Arbola, "Tree of Guernika"), a Q. robur that symbolizes traditional freedoms for the Biscayan people, and by extension for the Basque people as a whole. It has been replaced five times since the first was planted in the 14th century, using seedlings grown from the tree's acorns. The tree depicted on the stamp was the third, re-planted in 1860, which survived the Bombing of Guernica in 1937 but had to be replaced in 2015 because of a fungus.

Arbol de Guernica Spain

A 2004 stamp features the Terrona Oak (encina "La Terrona)" in Zarza de Montánchez, Extremadura. It is identified as Q. ilex on the stamp, but according to the Monumental Trees website, it is Q. rotundifolia. It is thought to be 500-700 years old and measured 17 m x 2.49 m dbh in 2016.

Quercus ilex La Terrona

One of a series of two stamps issued in 2000 featuring trees: Q. ilex (encina).

Quercus ilex

Issued in 2003, in a another two-stamp series featuring trees: Q. robur (roble).

Quercus robur

Part of five-stamp series of Flora, a stamp issued in 1972 features Q. ilex (encina).

Quercus ilex

Switzerland

Part of a four-stamp Pro Juventute ("For the Youth") series issued in 1992: Q. robur.

Quercus robur Switzerland

One of three stamps in a 2009 series showing Ancient Trees: Q. sp. (robur?).

Quercus robur Switzerland

Another tree series issued in 2021, consisting of four trees, this one an unspecified Quercus species, presumably Q. robur.

Quercus robur Switzerland

Syria

Issued to commemorate 2015 Tree Day, the stamp features an oak, without indicating a species. Difficult to tell from the image, but perhaps, based on the acorns, Q. libani?

Quercus libani

Taiwan

Part of a set depicting "potted miniature plants", issued in 1985. According to the The Postal Universal Website of R.O.C., this one is an oak tree, but it is difficult to determine the species if so.

oak.jpg

Uganda

Yet another stamp based on The Holy Family Under the Oak Tree by Raphael and Giulio Romano. Issued in 1993. Two other stamps in the series show details of the painting, but this is the only one that includes the oak tree.

Holy family under the oak tree

 

Ukraine

 

One of a series of 20 stamps of trees issued over several years starting in 2012: Q. robur (дуб звичайний, dub zvychaynyy, "common oak").

Quercus robur Ukraine

United Kingdom

Issued in 1973 as part of a two-stamp issue featuring trees: Q. robur.

Quercus robur UK

Issued in 1995 to commemorate the Centenary of the National Trust: an oak seedling, probably Q. petraea.

Oak seedling UK

A stamp issued in 2003, showing a stylized oak in relief. The species is undefined but could be Q. petraea.

Quercus petraea UK

One of five stamps issued in 1995 to mark the centenary of the National Trust, it shows an oak seedling (Q. petraea) and bears the legend "Protecting Land".

Oak seedling

Part of a 2010 series commemorating 10 famous scientists who were members of the Royal Society, celebrating 350 years of the Society. The stamp shows Alfred Russel Wallace (1823–1913), a British naturalist, best known for independently conceiving the theory of evolution through natural selection. Oak branches appear in silhouette above his face.

Wallace and oak UK

United States of America

Commemorating the 300th anniversary of the state of Connecticut, this 1935 stamp depicts the Charter Oak, an unusually large Q. alba growing on Wyllys Hyll in Hartford, Connecticut in the U.S., from around the 12th or 13th century until it fell during a storm in 1856. According to tradition, Connecticut's Royal Charter of 1662 was hidden within the hollow of the tree to thwart its confiscation by the English governor-general. The oak became a symbol of American independence and is commemorated on the Connecticut State Quarter. For Connecticut's tercentennial, it was depicted on a commemorative half dollar as well as on this stamp.

Charter Oak USA

Quercus alba was also selected for one of a series of four stamps issued in 1978 featuring U.S. trees.

Quercus alba USA

Part of a series of 13 stamps issued between 1987 and 1990 to commemorate the Bicentennial Ratification of the Constitution, one for each state that ratified the Constitution. The stamp corresponding to the state of Georgia shows an oak, and based on the Tillandsia usneoides (Spanish moss) draping from its branches, one might venture to say it is Q. virginiana (live oak).

Quercus virginiana

Issued in 1964 to commemorate, a stamp depicts a lute, a horn, a music score, and branches of laurel and oak of indeterminate species.

American Music

In 1999 the U.S. Postal Service introduced stamps that could be purchased and printed via a personal computer. One of the designs used in 2008 showed oak leaves with fall colors, possibly Q. rubra.

Oak leaves US

Part of a series featuring photos of microscopic life, a Forever Stamp issued in 2023 used an image created by Jason Kirk that won first place in the Small World Photomicrography Competition sponsored by Nikon. It shows trichomes and stomata on a the leaf of a Q. virginiana (more details here). 

Oak Leaf Surface

Vatican City

In 1995, Vatican City issued a series of definitive stamps highlighting the theme "European Year of Nature Conservation." This stamp depicts the Fountain of the Eagle in the Vatican Gardens with some Q. ilex in the background.

Quercus ilex Vatican

Western Sahara

This is a philatelic oddity as stamps issued by Western Sahara have been declared illegal by the postal administration of Morocco. All illegal stamps inscribed SAHARA OCC. were produced and distributed to the philatelic market by illegal stamp producing entities located in the UK and Eastern Europe. Nevertheless, one of these stamps, issued in 1992, shows leaves and catkins of Q. ilex.

Quercus ilex Western Sahara

Yugoslavia

Port a series of 14 stamps issued in late 1978 to commemorate New Year 1979: Q robur.

Quercus robur Yugoslavia

One of 20 stamps issued between 1992 and 2002 highlighting concern for the protection of nature: Q. robur (issued in 1997).

Quercus robur Yugoslavia

Another stamp in the same series, also issued in 1997, shows a great capricorn beetle (Cerambyx cerdo) on an oak leaf and trunk. The larvae of the beetle grow in the bark of oak trees.

Quercus robur Yugoslavia

Acknowledgments

I have IOS member Claudio Pedró to thank for the idea of writing about this subject. I'd also like to thank Wei Wang and Jacquiline Roberts for pointing out stamps I had missed. And thank Wei also for the stamp album and stamps to start the collection.