Ampelocalamus

from Wikipedia, the free encyclopedia
Ampelocalamus
Systematics
Commelinids
Order : Sweet grass (Poales)
Family : Sweet grasses (Poaceae)
Subfamily : Bamboo (Bambusoideae)
Tribe : Arundinarieae
Genre : Ampelocalamus
Scientific name
Ampelocalamus
SLChen , THWen & GYSheng

Ampelocalamus is a genus of woody, shrubby growing bamboo species . The distribution area extends from the Himalayas to the south of China.

description

The representatives of the genus Ampelocalamus grow shrubby. The rhizomes are pachymorphic with short necks. The stalks grow in tufts, hanging or climbing. The internodes are round and finely grooved. The vaginal scars above the knot are usually raised and corky. The buds in the middle of the stalks are broadly ovate. Many knee-shaped, bent branches are formed per bud, with the central branch often being the largest. The straw leaf sheaths are membranous, shorter than the internodes and fall off early. The ligule of the culmsheath is clearly developed. The auricles are usually well developed and often show clear eyelashes (oral setae). The blade blade is lanceolate to narrowly lanceolate and curved back. The leaves are small to large. The ligule of the leaves is clearly developed, the auricles are also mostly clearly developed. The leaf blade shows indistinct transverse leaf veins.

The inflorescences are clumpy growing, hanging panicles on leafy or non-leafy branches. They show no bracts or some poorly developed leaf sheaths. The spikelets grow pendulous on long inflorescence branches and curved stems. Each spikelet bears two to seven fertile florets and closes with a sterile floret. The internodes of the inflorescence axis are about half as long as the florets. Two thin glumes are formed per spikelet . The palea is membranous, the lemma about the same length or somewhat longer, twice keeled and obtuse. Three translucent cavernous bodies are formed. The three stamens have long, free-standing stamens and yellow anthers. There are no appendages on the ovary . A stylus with two feathery scars is formed. The fruits are ovate to elongated and bald caryopses .

New sprouts appear late in early summer.

Distribution and ecology

The natural range of about 13 species extends from the central Himalayas to the south of China.

Systematics and research history

Ampelocalamus is a genus from the family of grasses (Poaceae), in which it the subfamily Bambusoideae , tribe Arundinarieae is assigned. The genus was established in 1981 by Shou Liang Chen , Tai Hui Wen and Guo Ying Sheng in the Acta Phytotaxonomica Sinica . A synonym of the genus is Patellocalamus W.T.Lin .

The following species are assigned to the genus:

Another species from Hunan , Ampelocalamus anhispidis T.H.Wen , was described in the Journal of Bamboo Research in 1985 , but classification into the genus is uncertain. Further collections of specimens are still necessary to allow a definitive assignment.

Individual evidence

  1. ↑ a b c d e De-Zhu Li, Chris Stapleton: Ampelocalamus In: Flora of China. Volume 4, p. 99.
  2. ↑ a b Ampelocalamus in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
  3. ↑ Ampelocalamus . In: The International Plant Name Index. Retrieved February 15, 2015 .
  4. ↑ a b c d e f g h i j k l m n o Rafaël Govaerts (Ed.): Ampelocalamus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved August 22, 2018.

literature

  • Wu Zheng-yi, Peter H. Raven, Deyuan Hong (Eds.): Flora of China . Volume 22: Poaceae . Science Press / Missouri Botanical Garden Press, Beijing / St. Louis 2006, ISBN 1-930723-50-4 , pp. 106 (English).

Web links

  • WD Clayton, M. Vorontsova, KT Harman, H. Williamson: Ampelocalamus. In: GrassBase - The Online World Grass Flora. Royal Botanic Gardens, Kew, accessed February 15, 2015 .