Trees by Genus

Genus 'Quercus'

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Quercus agrifolia
Quercus alba
Quercus bicolor
Quercus canariensis
Quercus castaneifolia
Quercus cerris
Quercus chrysolepis
Quercus coccinea
Quercus dentata
Quercus frainetto
Quercus glauca
Quercus x hispanica
Quercus ilex
Quercus imbricaria
Quercus kelloggii
Quercus laurifolia
Quercus x leana
Quercus libani
Quercus x ludoviciana
Quercus macranthera
Quercus macrocarpa
Quercus marilandica
Quercus myrsinifolia
Quercus nigra
Quercus palustris
Quercus petraea
Quercus phellos
Quercus pontica
Quercus prinus
Quercus pubescens
Quercus pyrenaica
Quercus pyrenaica 'Pendula'
Quercus robur
Quercus robur cv. 'Filicifolia'
Quercus robur forma purpurascens
Quercus rubra
Quercus schumardii
Quercus suber
Quercus trojana
Quercus x turneri
Quercus velutina

Quercus kelloggii (Californian Black Oak)

No sample available

Native: Valley and coastal mountain ranges of California and Oregon to an altitude of 2000m

Location: Grown in botanical collections in Europe.

Acorns were once the staple diet of the Californian Indians and the brittle wood used for fuel. Height to 25m or more.

Foliage

Leaves 7.5-15cm long, dark shining green above, paler below.

Flowers

Quercus kelloggii

Flower can be seen in early May with the new leaves, the females are in the leaf axils.

Fruits

Quercus kelloggii

Acorns are 3.7cm long, deeply enclosed in the cup, take two years to form and fall around October.