Oaks of the World

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  Quercus engleriana
Author Seemen 1897 Bot. Jahrb. Syst. 23(57): 47
Synonyms dolichostyla A.Camus 1934
kongshanensis Y.C.Hsu & H.Wei Jen 1976 Acta Phytotax. Sin. 14(2): 85
lanceolata Qu & Zhang 1984, nom. illeg.
lyoniifolia Cheng 1950
obscura Seemen 1897 not Trel.
shangxiensisZ.K. Zhou 1998 Acta Bot. Yunnan. 20: 44
sutchuenensis Franch. 1899
Local names ba dong li ;
Range China (Szechwan, Hupeh, Shaanxi), Tibet, Assam ; 700 to 2700 m ; introduced in Europe in 1900 by Wilson ;
Growth habit 6-8 m, but may reach 15 m;
Leaves 6-12 x 3-4.5 cm; evergreen (old leaves fall as the new ones unfold); thick, very stiff; oval, subelliptic, oval-lanceolate or lanceolate; pointed and acuminate at apex; base rounded or cordate or sometimes somewhat cuneate; margin toothed in the apical half, or sometimes entire; dark shining green, hairless above ; at first yellowish-brown pubescent beneath, becoming glabrous, except fascicled hairs sometimes remaining at vein axil; 10-13 vein pairs strongly raised beneath, at an angle or 40-45° with midrib; petiole 1-2 cm, tomentose becoming glabrous;
Flowers May-June; male inflorescences 7-8 cm, hairy, multiflowered; female inflorescences 1-3 cm at the axil of the leaves at the end of the new twigs;
Fruits acorn ovoid-oblong 1-2 cm long, acute, mucronate, glabrous; single or to 10 together on a 1-1.5 cm long rachis; cup shallow enclosing 1/3 of nut, sessile, 0.8-1.2 cm in diameter; scales oval-lanceolate 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; buds narrow; silky stipules 10-15 mm long;
Hardiness zone, habitat probably hardy; all types of soils;
Miscellaneous

-- Sub-genus Cerris, Section Ilex;
-- A. Camus : tome 2, p. 35, n° 139;

-- In 2007, Govaerts places Q. shanxiensis as a true species in Shanxi.

-- For The Plant List 2013, Q. kongshanensis is a true species.

Subspecies and
varieties 		-- Q.marlipoensis Hu & Cheng 1951 (Acta Phytotax. Sin. 1: 142)
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. Threatened (IUCN Red List Category : CR)
Pictures

drawing