Oaks of the World

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 Quercus engleriana
AuthorSeemen 1897
Synonymsdolichostyla A.Camus 1934
kongshanensis Y.C.Hsu & H.Wei Jen 1976
lanceolata Qu & Zhang 1984, nom. illeg.
lyoniifolia Cheng 1950
obscura Seemen 1897 not Trel.
shangxiensis Zhou 1998
sutchuenensis Franch. 1899
Local namesba dong li ;
RangeChina (Shaanxi), Tibet, Assam ; 700 to 2700 m ; introduced in Europe in 1900 by Wilson ;
Growth habit6-8 m, but may reach 15 m;
Leaves 6-14 x 3.5-4.5 cm; semi-evergreen; oval lanceolate; thick, very stiff; pointed, base rounded or cordate or sometimes somewhat cuneate; hairless and rough above, pubescent beneath except fascicled hairs sometimes remaining at vein axil; margin entire or sometimes  toothed near apex; 10-13 vein pairs strongly raised beneath; petiole 1-2 cm, tomentose becoming glabrous;
FlowersMay-June; female inflorescences 1-3 cm at leaf axil, terminal on young shoots;
Fruitsacorn 1-2 cm long, mucronate, glabrous; cup shallow enclosing 1/3 of nut, sessile, 0.6-1 cm in diameter; scales 1 mm long, brown tomentose near base, glabrous and reddish at apex; maturing in 1 year;

Bark, twigs and
buds

bark dark brown, thin; young twigs yellow grey tomentose, becoming glabrous; oblong, brownish lenticels;
Hardiness zone, habitatprobably hardy; all types of soils;
Miscellaneous -- Belongs to the Ilex Group, according to Denk & Grimm 2010;
-- A. Camus : n° 139;
Subspecies and
varieties
-- Q.marlipoensis Hu & Cheng 1951 is very close to Q.engleriana in its southern range (SE Yunnan, at 1100 m), with larger leaves (15-22 x 6-11 cm) sometimes oboval and with 16-20 vein pairs;
Pictures

drawing