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Editor's Picks

Quercus coccifera, 97 cm dbh and 15 m canopy spread
Cyprus, April-May 2026 – Vacation Impressions
Images and insights from Ezra Barnea’s journey to Cyprus’s...
Ezra Barnea | Jun 13, 2026
Lainey Kirshberger and Ryan Silver, students at Oklahoma State University, participated in the fieldwork and will lead the genetic and epigenetic analysis under the supervision of Dr. Antonio R. Castilla.
Epigenetics as a Potential Mechanism of Rapid Response to Climate Change in the Endangered Oak Quercus hinckleyi
Endangered oak Quercus hinckleyi shows strong genetic...
Website Editor | Jun 09, 2026
The current Red List status and modelled outlook for the eight Californian oak species, plus tanoak
The Threat to California’s Oaks Is Greater than Had Been Anticipated
New paper should significantly change our approach to...
Steve Potter | Jun 09, 2026

Plant Focus

Quercus orocantabrica
Species Spotlight: Quercus orocantabrica Rivas Mart., Penas, T.E.Díaz & Llamas
Roderick Cameron and Carlos Vila-Viçosa give an account of this intriguing species from northwestern Iberia with a complex taxonomic and...
Read more

Join the IOS

Thank you for your interest in becoming a member of the international Oak Society!

As a member you will:

  • Receive Oak News & Notes, our newsletter which is published twice a year, and International Oaks, the full-color Journal of the IOS, published once a year
  • Be able to participate in the Triennial Conferences
  • Be able to participate in many oak-related events all over the world such as the Oak Open Days
  • Access the “members only” parts of our website, chiefly the online membership directory, an invaluable network of contacts in over 30 countries on six continents, recordings of IOS Webinars, and online versions of recent issues of International Oaks.

Membership Types:

  • Standard Membership (1–2 persons in the same household): full membership benefits, with option to sign up for 2- or 3-year terms with a discount.
  • Electronic Membership (1–2 persons in the same household): membership benefits (International Oaks and Oaks News & Notes online only); renewed annually.
  • Student Standard Membership (1–2 persons in the same household): membership benefits (Oak News & Notes online only); renewed annually. Students must provide the name of their institution and specify their degree program.
  • Student Electronic Membership (1–2 persons in the same household): as above, with electronic membership benefits.
  • Standard Institutional Membership: membership benefits for an unlimited number of staff members; 1 copy of International Oaks; recognition in IOS publications and email communications.
  • Supporting Institutional Membership: membership benefits for an unlimited number of staff members; 3 copies of International Oaks; recognition in IOS publications and email communications.
  • Life Membership (1–2 persons in the same household): full membership benefits for life.

Membership Fees (annual, in US dollars):

  • Standard Membership is available at four levels; these have the same membership benefits but different levels of support for the Society’s mission and goals:
    •    Insignis:* $100
    •    Glauca: $80
    •    Rubra: $60
    •    Cerris: $50
    *with optional recognition in International Oaks

Standard Memberships are available for 2-year terms ($5 total discount) and 3-year terms ($10 total discount)

  • Electronic Memberships are priced at 50% of the Standard fee, also at four levels, but they are only available for 1-year terms.
  • Student Memberships:
    •    Standard: $25 (1-year term only)
    •    Electronic: $12.50 (1-year term only)
  • Institutional Memberships:
    •    Standard:    $500 (1 year) or $1,250 (3 years)
    •    Supporting: $750 (1 year) or $2,000 (3 years)
  • Life Membership: $1,500

Bear in mind that 10% of your membership dues will be allocated as a contribution to the Oak Conservation and Research Fund (Life Memberships excluded). The IOS thanks you in advance for supporting our Society as an active conservation organization. Please consider increasing your support by making an additional contribution at any time on our donation page here.

If you have any questions about any of the membership types or fees, please email IOS membership management at membership@internationaloaksociety.org

Note that you are already a member of the IOS. If you wish to renew your membership, please go to your account by clicking here

To become a member of the IOS, please click here

To become a member of the IOS, you should first subscribe to The Cupule, or free e-bulletin. You will then have a username and password to access the website.

Subscribing to The Cupule will give you limited access to the website. To access all of the features, you must be a member of the IOS. When you log into the website with your username and password, you will find instructions to join the IOS on the home page.

Please subscribe to The Cupule here.

If you already have a username and password, please log in here.

Note that if you are already a member, you need only to create an account to have full access. The site will recognize you as long as you use the email address you communicated to IOS membership management when you became a member. When you log in using the username and password you choose when you create an account, you will have full access.