E-Flora BC: Electronic Atlas of the Flora of British Columbia

Quercus garryana Douglas ex Hook. var. garryana
Garry oak
Fagaceae (Beech family)

Introduction to Vascular Plants
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E-Flora BC Static Map
Distribution of Quercus garryana var. garryana
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Species Information

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Deciduous tree with heavy, craggy branches, up to 25 m tall but often small, shrubby and as short as 1 m in dry, rocky habitats; trunks up to 1 m wide; bark light grey with thick scaly ridges.
Alternate, deciduous, blades oblong to egg-shaped in outline with 3-7 lobes per side, the lobes entire or 2-3 toothed, up to 12 cm long with stalks 1-2 cm long, the largest sinuses extending more than halfway to the midrib, bright shiny green and glabrous above, paler below with reddish to yellow hairs, turning yellowish-brown in the fall.
Inflorescence of tiny inconspicuous male and female flowers, these separate but on the same tree; female flowers clustered or single surrounded by a scaly cuplike involucre; male flowers numerous in catkins.
Acorns, 1-seeded, maturing in one season, unstalked, egg-shaped to nearly round, 2-3 cm long; cups shallow, bumpy, hairy within.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry grasslands and rock outcrops in the lowland zone; locally common on SE Vancouver Island and the Gulf Islands, rare in the lower Fraser Valley; S to CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Quercus garryana var. garryana

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 20 116 315
Slope Gradient (%) 0 34 135
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
23 245 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 2 7
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: CDF(81), CWH(1)

Taxonomic and Nomenclatural Links

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General References