Oaks of the World

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  Quercus tarokoensis
Author

Hayata 1918 Icon. Pl. Formosan. 7: 38

Diagnosis here

Synonyms
Local names tai lu ge li ;
Range East Taiwan (Taroko National Park); 400-1300 m; on steep slopes;
Growth habit usually a shrub, but reaches 12 m tall;
Leaves 2-4 x 1.5-2.8 cm; evergreen; leathery; oval-oblong; apex acute to obtuse; base more or less cordate; margin toothed (3-5 pairs of spiniform teeth); both faces hairless, but sometimes stellate hairs along midrib above and beneath; 5-8 pairs of secondary veins, parallel, inconspicuous above; petiole 3-5 mm long, brown tomentose;
Flowers June-July; male catkin tomentose, 3 cm long; 4-5 stamens with 2.5 long filament;
Fruits acorn ovoid or subglobose, 1.4-1.8 cm long, 0.8-1 cm wide, glabrous; enclosed 1/4 by cup; cup 1.2 cm wide, 0.7 cm high, with small, ovate to triangular, appressed, tomentose scales except at tip; small basal scar 3 mm in diameter; maturing the following year in November-December.

Bark, twigs and
buds

bark reddish to grey brown; twigs slender, grey brown pubescent at first, becoming glabrous, with brownish orbicular lenticels; stipules deciduous, linear, 6-7 mm long;
Hardiness zone, habitat not hardy; prefers calcareous soils;
Miscellaneous -- A. Camus : tome 2, p. 19;
-- Belongs to the Sub-Genus Cerris, Section, Ilex, according to Denk & Grimm 2010;
-- Differs from Q. spinosa in having more acute, smaller, thinner and less wrinkled leaves;
-- Close relationship with Q. variabilis, Q. dolicholepis and Q. baronii;

Subspecies and
varieties
Pictures

drawing