| Quercus austrocochinchinensis | |
| Author | Hickel & A.Camus 1921 Ann. Sci. Nat., Bot. X, 3: 386 1921. |
| Synonyms | Cyclobalanopsis
austrocochinchinensis (Hick. & A.Camus) Hjelmquist 1968 |
| Local names | yue nan qing gang; |
| Range | Thailand, Vietnam,
Laos, China (Yunnan) ; from 700 to 1000 m ; |
| Growth habit | 15-20 m tall; trunk reaching 1 m in diameter; |
| Leaves | 10-15 x 3-5
cm; leathery, stiff; oblong-elliptic to lanceolate; apex shortly pointed
or acuminate; base cuneate; young leaves pubescent both sides, mature
leaves glabrous; bright green above; margin slightly undulate, with 2-6
pairs of short, blunt teeth along apical half; 10-15 pairs of lateral
veins slightly raised above, prominent beneath; tertiary veins evident
abaxially; petiole to 1-2 cm, with stellate hairs, becoming glabrous;
|
| Flowers | female inflorescences few-flowered ; flowers hairy, rusty, with 4-5 styles ; |
| Fruits | acorn 1.3-1.8
in diameter x 1-1.4 cm long; flattened, with base truncate; yellow brown
silky tomentose; enclosed completely or nearly so (except apex) in thin
(2 mm), tomentose (inside and outside) cup; cup with 7-9 concentric, denticulate
rings ; scar on the whole base of nut, convex; stylopodium persistent;
|
|
Bark, twigs and |
bark pale grey, somewhat whitish; branchlets yellowish, stellate-haired but glabrescent, with numerous oblong lenticels; small bud, globose, 2-3 mm wide, with 4 pairs of rounded scales |
| Hardiness zone, habitat | not
hardy; scattered in mountain forests and along streams; |
| Miscellaneous | --
A. Camus : tome 1, p. 350, n° 74; -- Sub-genus Cerris, Section Cyclobalanopsis; -- Section Helferiana, sub-section Helferianae (Menitsky); -- Threatened (IUCN Red List Category : VU). -- Closely related to Q.thorelii -- Hybridizes with Q. kerrii; |
| Subspecies and varieties |
|
| Pictures |
|
drawing
2
