Oaks of the World

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  Quercus kerrii
Author Craib 1911
Synonyms Cyclobalanopsis kerrii (Craib) Hu 1940
dispar Chun & Tsiang 1947, nom. illeg.
vestita Rehd. & Wils. in Sarg. 1916 not Griff. 1848
Local names mao ye qing gang ;
Range SW China; Thailand; Vietnam; Myanmar; Laos; 100-1800 m;
Growth habit usually 7-8 m, but reaches 20 m;
Leaves 10-24 x 3-8 cm; evergreen or nearly so; leathery; oblong-elliptic, lanceolate or oblong-lanceolate; margin apical 2/3 serrate;  apex slightly obtuse to shortly acuminate; base rounded or broadly cuneate; shiny green above, hairy beneath; midrib weakly raised underside; 10-14 veins pairs; tertiary veins evident abaxially; petiole tomentose 1-2 cm long;
Flowers March to May; pistillate inflorescence solitary, 2-6 cm long;
Fruits acorn globose flattened, 0.7-1.3 cm high, 2-2.8 cm in diameter; apex flat or depressed;  several on a 4 cm long peduncle; slightly raised basal scar, 1-2 cm wide; enclosed 1/4 to 1/2 by cup; cup flat, 0.5-1 cm heigh, 2-3.5 cm in diameter, with bracts in 7-11 pubescent, entire or denticulate concentric rings; stylopodium persistent, greyish pubescent; maturing in 1 year;

Bark, twigs and
buds

twig densely tomentose at first, becoming glabrous or nearly so;
Hardiness zone, habitat not hardy; scattered in mountains forests;
Miscellaneous --A. Camus : n° 69;
-- Sub-genus Cyclobalanopsis, section Helferiana, sub-section Helferianae (Menitsky);
-- Closely related to
Q.helferiana ; according to Hjelmquist 1968, only Q.helferiana, and not Q.kerrii, occurs in China;
-- For some Authors (Menitsky, Govaerts & Frodin), Q.kerrii is a synonym of
Q.mespilifolia;
-- Q.vestita Griff. 1848 is a species from India (Meghalaya), Myanmar, Laos, may be from Thailand too, with problematic taxonomic status;
Subspecies and
varieties

 

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