Ostrya yunnanensis

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Ostrya yunnanensis
Systematics
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Order : Beech-like (Fagales)
Family : Birch family (Betulaceae)
Subfamily : Hazelnut family (Coryloideae)
Genre : Hop beech ( Ostrya )
Type : Ostrya yunnanensis
Scientific name
Ostrya yunnanensis
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Ostrya yunnanensis is a tree belonging to the genus hop beech ( Ostrya ). The natural range of the species is in China .

description

Ostrya yunnanensis is a tree up to 20 meters high with dark gray bark . The twigs are reddish brown, striped, densely hairy and later balding. The leaves have a 5 to 10 millimeter long, densely hairy yellow-tomentose stalk. The leaf blade is 5 to 10 centimeters long and 2 to 2.5 centimeters wide, lanceolate to oblong-lanceolate, long pointed and tapered, with a wedge-shaped, rarely rounded base and double-prickly sawn leaf margin. 18 to 20 pairs of nerves are formed at a distance of 4 to 5 millimeters. The underside of the leaf is covered with yellow tomentose hairs and has axillary whiskers, the upper side is sparsely haired.

Female inflorescences are erect, densely racemose and 4 to 6 inches long. The inflorescence axis is about 2 inches long and densely hairy yellow tomentose. The bracts are 1.5 to 2 centimeters long, 0.7 to 0.9 centimeters wide, egg-shaped-elliptical, sack-shaped, pointed and prickly, with a rounded base and bristly leaf margin, membranous, reticulate and finely hairy. The nuts are light brown, 6 to 7 millimeters long with a diameter of about 3 millimeters, egg-shaped-elliptical, ribbed, with shaggy hair only at the tip, otherwise bare. Ostrya yunnanensis flowers from June to July, the fruits ripen from July to August.

Occurrence

The natural range of the species is in China in the northwest of the Yunnan province . Ostrya yunnanensis grows there in damp forests at altitudes of about 2600 meters.

Systematics

Ostrya yunnanensis is a species of the hop beech genus ( Ostrya ). This is in the family of birch plants of the subfamily (Betulaceae) coryloideae assigned (Coryloideae). The species was first scientifically described in 1979 by Wen Kwang Hu . The generic name Ostrya comes from Latin and was already used by the Romans for the hop beech. The specific epithet yunnanensis refers to the distribution area in Yunnan.

proof

literature

  • Wu Zheng-yi, Peter H. Raven (Ed.): Flora of China . Volume 4: Cycadaceae through Fagaceae . Science Press / Missouri Botanical Garden Press, Beijing / St. Louis 1999, ISBN 0-915279-70-3 , pp. 301 (English).
  • Helmut Genaust: Etymological dictionary of botanical plant names. 3rd, completely revised and expanded edition. Nikol, Hamburg 2005, ISBN 3-937872-16-7 (reprint from 1996).

Individual evidence

  1. ↑ a b c d Pei-chun Li, Alexei K. Skvortsov: Ostrya yunnanensis , in the Flora of China , Volume 4, p. 301
  2. ↑ Ostrya. In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed June 3, 2012 .
  3. ↑ Exactly: Etymological Dictionary of Botanical Plant Names, pp. 446–447
  4. ↑ Exactly: Etymological Dictionary of Botanical Plant Names , p. 697

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