Oaks of the World

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  Quercus berberidifolia

Liebm. 1854 Overs. Kongel. Danske Vidensk. Selsk. Forh. Medlemmers Arbeider 1854: 172 1854.

Diagnosis here

Synonyms dumosa Nuttall 1842 in part
agrifolia var. berberidifolia (Liebm.) Wenz. 1884
dumosa f. berberidifolia (Liebm.)
Trel. 1924
dumosa var. munita Greene 1889
Local names inland scrub oak ; California scrub oak
Range California, Mexico; from 100 to 1800 m ;
Growth habit 1-4 m, sometimes shrubby, with several trunks; more erect and straighter than Q.dumosa;
Leaves 1.5-3 x 1-2 cm; evergreen; elliptic to oboval; base truncate or remotely rounded; apex somewhat pointed; margins toothed, spiny (2-7 pairs of teeth); lustrous green and glabrous above; glaucous, bloomy, weakly pubescent beneath with few short, 6-8 rays stellate trichomes; petiole hairy, 2-4 mm long;
Fruits acorn 1.5-3 cm; solitary or paired; barrel-shaped, brown; cupule glabrous inside, subsessile, with rusty knobbed scales, covering 1/4 of nut; maturing in 1 year;

Bark, twigs and

bark grey, scaly; branchlets grey or rusty, stiff; buds brown, globose, minutely pubescent, 2-3 mm long;
Hardiness zone, habitat hardy zone 7; inhabits dry sites;
Miscellaneous -- A. Camus : n° 176;
-- Sub-genus Quercus, Section Quercus, Series Dumosae;
-- Introgression with Q.dumosa, the "coastal scrub oak", or "Nuttall's scrub oak";
-- Today's taxonomists actually distinguish 2 different species : Q.dumosa in coastal ranges, and Q.berberidifolia going inland; moreover, plants native to Santa Catalina Island and other neighbouring islands, first considered as varieties of Q.dumosa, later identified to Q.berberidifolia, are currently named Q.pacifica.
-- Different from Q.dumosa and from Q.durata var. gabrielensis (both have abundant hairs on the leaves undersides), from Q.cornelius-mulleri (still more pubescent beneath), from Q.john-tuckeri (glaucous leaves and larger acorns), and from Q.turbinella (glaucous leaves and stalked acorns);
-- Hybridizes with many other Californian white oaks : see Q.x acutidens

Subspecies and