Oaks of the World

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 Quercus rehderiana
AuthorHand.-Mazz. 1925
Synonymslongispica (Hand.-Mazz.) A.Camus 1936 (Camus = n° 94)
pseudosemecarpifolia A.Camus 1936
semecarpifolia var. glabra Franchet 1899
semecarpifolia subsp glabra (Franch.) Hand.-Mazz. 1929
semecarpifolia var. longispica Handel-Mazzetti 1929
dilatata var. yunnanensis Schottky 1912
Local namesmao mai gao shan li ;
RangeChina (Yunnan, Sichuan, Guizhou), Tibet, Thailand ; 1500 - 4000 m ;
Growth habitmay reach 20 m tall; at high elevation is only a small tortuous shrub;
Leaves 3-6 x 2-4 cm; persist for 3 years; oval; rounded at both ends; margin entire, remotely wavy, with some spiny teeth; glabrescent on both sides (hairs beneath, if any, are simple and fascicled); 4-12 vein pairs, not sunken underneath; petiole 2-7 mm long;
FlowersMay-June; large pistillate inflorescences 3,5-12 cm long; male catkins reaching 18 cm long;
Fruitsacorn small, 1 cm long, 0.8 cm in diameter; mucronate; enclosed 1/2 by cup; cup scaly, 0.8-1.2 cm in diameter; maturing in 2 years;

Bark, twigs and
buds

young twigs at first pale brown tomentose, becoming hairless;
Hardiness zone, habitathardy;
Miscellaneous

-- A. Camus : n° 95;
-- Sub-genus Quercus, section Cerris;
-- For some Authors, Q.longispica is a separate species, featuring a rusty, persistent tomentum (made of various types of hairs including glandular ones on the lower side of the leaves), margins entire or with spiny teeth, and pistillate inflorescences 5-16 cm long ; for other today Authors, it is a synonym of Q.semecarpifolia;
-- For Menitsky, Q.rehderiana has several synonyms : Q.semecarpifolia subsp glabra, Q.aquifolioides, Q.guajavifolia, Q.longispica and Q.pseudosemecarpifolia.
-- See the Key for Asian similar Quercus;

Subspecies and
varieties
-- Q. pseudosemecarpifolia could be a variety whose leaves feature scattered hairs beneath; Sichuan, Yunnan, Xizang.
Pictures

drawing 1
drawing 2