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Quercus pentacycla | |
Author | Y.T.Chang 1966 Acta Phytotax. Sin. 11: 256 |
Synonyms | Cyclobalanopsis pentacycla (Y.T. Chang)Y.T. Chang ex Y.C.Hsu & H. Wei Jen 1976 |
Local names | wu
huan qing gang ; |
Range | China (SE Yunnan, Malipo xian) 1400-1500 m ; |
Growth habit | reaches
15 m tall; |
Leaves | 10-14 x 4-6 cm; oval-elliptic; leathery; apex acute to shortly acuminate; base slightly rounded, oblique; green, hairless above; pubescent, whitish beneath; margin denticulate; 13-15 vein pairs; tertiary veins slender, evident beneath; petiole glabrous, sulcate, 1.5-2 cm long; |
Flowers | |
Fruits | acorn
1.7 cm long, 1.2 cm wide; ovoid-ellipsoid; shiny reddish brown; enclosed
1/2 or 1/3 by cup; cup thin (1 mm), whitish tomentose outside, with 4-5
concentric rings denticulate at margin; scar 7 mm in diameter, convex;
stylopodium persistent; maturing in 1 year; |
Bark, twigs and |
twigs stout, hairless, greyish brown, with a few grey lenticels; |
Hardiness zone, habitat | mixed
mountain forests; |
Miscellaneous | --
Sub-genus Cerris, Section Cyclobalanopsis; -- Close to Q.argyrotricha from which it differs in having larger leaves less acuminate, twigs glabrous, cup with whitish hairs instead of yellow ones, and only 4-5 concentric rings on the cup; |
Subspecies and varieties |
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Pictures |