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Quercus argyrotricha | |
Author | A.Camus 1931 Bull. Mus. Natl. Hist. Nat. II, 3: 689 1931. |
Synonyms | Cyclobalanopsis argyrotricha (A.Camus) Chun & Y.T.Chang ex Y.C.Hsu & H.Wei Jen 1993 |
Local names | gui
zhou qing gang; |
Range | China (Guizhou) about 1600 m ; |
Growth habit | tree to 10 m and more; |
Leaves |
12-16 cm long, 3-6 cm wide; leathery; oval to oval-elliptic; long acuminate at apex; base oblique and rounded; dark, lustrous and glabrous above; silvery stellate tomentose beneath; margin denticulate at the end of the 9-14 pairs of secondary veins; midrib and secondary veins flat adaxially; tertiary veins inconspicuous on both sides; petiole 1-2 cm long, at first tomentose then becoming glabrous; bronze when young; |
Flowers | |
Fruits | acorn mucronate,
broadly ovoid or subglobose, 0.8-1.5 cm in diameter; solitary; densely,
golden yellow hairy; sessile or on a short peduncle; enclosed for 1/2
in cupule 0.5-0.7 cm long, 1-1.6 cm in diameter, 2 mm thick, with 6-7(-9)
concentric rings yellow hairy; |
Bark, twigs and |
twigs first yellow brown tomentose, becoming glabrous; lenticels evident; bud rounded, with oval, obtuse, silky scales; |
Hardiness zone, habitat | broad-leaved evergreen forests, on mountain slopes and in valleys; hardy zone 7-8; |
Miscellaneous | --
A. Camus : tome 1, p. 360, n° 79; -- Sub-genus Cerris, section Cyclobalanopsis; -- Closely related to Q.oxyodon Miq. -- Threatened (IUCN Red List Category : CR) |
Subspecies and varieties |
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