Log in

Editor's Picks

4_-_copy.jpg
During the month of October, I am posting daily tweets...
Andrew Hipp | Oct 12, 2019
The Mendota Dakota tribal community honored arborist Dan...
Dan Keiser | Oct 12, 2019
lloyd_kenyon.jpg
Everyone who knew Lloyd will be as shocked and saddened as...
Shaun Haddock | Aug 24, 2019

Plant Focus

quercus_robur_tromp_dwarf-003.jpg
Dwarf cultivars can be ideal for a small garden. Here are three "mini oaks". 

2016: A Good Year For Acorns at the Arboretum des Pouyouleix

Quercus dolicholepis

Last year (2015) several species that had never produced acorns did so (Quercus acutissimaQ. agrifolia, Q. faginea subsp. broteroi, Q. frutex, and Q. hirtifolia). One of the Q. hirtifolia acorns germinated where it fell.

This year a great number of species are producing acorns for the first time. Nearly every day, I am discovering new ones. This is most probably related to the age of these trees but I was wondering if there might not be some correlation between this and the weather we have had in northern Europe this year, i.e., a very mild winter and enormous amounts of rain throughout spring until the end of June? I would be interested to know if others are noticing a significant number of “first-time-fruiting” trees.
 

  • Q. grahamii × mexicana (APO634; 12 yrs old)
  • Q. brantii (APO157; grafted tree, planted 12 yrs ago)
  • Q. buckleyi (APO127; estimated age: 17 yrs old)
  • Q. ×capesii (APO604; grafted tree, planted 11 yrs ago)
  • Q. crassipes (APO820; 10 yrs old)
  • Q. dolicholepis (APO912; 11 yrs old)
  • Q. eduardi (APO793; 10 yrs old)
  • Q. emoryi (APO423; 14 yrs old)
  • Q. ×heterophylla (APO752; estimated age: at least 12 yrs old)
  • Q. hypargyrea (APO628; 11 yrs old)
  • Q. hypoleucoides (APO784; 10 yrs old)
  • Q. imbricaria (APO76; estimated age: at least 18 yrs old)
  • Q. laeta (APO1235; 8 yrs old)
  • Q. ×libanerris (APO362; estimated age: at least 14 yrs old)
  • Q. myrtifolia (APO927; 9 yrs old)
  • Q. palmeri (APO1245; 8 yrs old)
  • Q. palustris (APO104; estimated age: at least 17 yrs old)
  • Q. prinoides (APO113; estimated age: at least 17 yrs old)
  • Q. shumardii (APO117; estimated age: at least 17 yrs old)
  • Q. texana (APO119; estimated age: at least 17 yrs old)

The species that have been producing acorns consistently for several years now include:
 

  • Q. acerifolia
  • Q. aff. miquihuanensis
  • Q. coccifera subsp. calliprinos
  • Q. dentata
  • Q. galeanensis
  • Q. hintoniorum
  • Q. ilicifolia
  • Q. marilandica
  • Q. miquihuanensis
  • Q. monimotricha
  • Q. pumila
  • Q. striatula
  • Q. wislizeni var. frutescens
Quercus palmeri Quercus shumardii
Quercus myrtifolia Quercus prinoides
Quercus brantii Quercus imbricaria
Quercus eduardi Quercus grahamii × mexicana
Quercus crassipes Quercus hypleucoides

All photos © Béatrice Chassé