Awn comb grass

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Awn comb grass
Awn crested grass (Cynosurus echinatus)

Awn crested grass ( Cynosurus echinatus )

Systematics
Commelinids
Order : Sweet grass (Poales)
Family : Sweet grasses (Poaceae)
Subfamily : Pooideae
Genre : Comb grass ( Cynosurus )
Type : Awn comb grass
Scientific name
Cynosurus echinatus
L.

The awn comb grass ( Cynosurus echinatus ), also called hedgehog comb grass , is a species of the genus comb grass ( Cynosurus ) and thus the family of sweet grasses (Poaceae).

description

inflorescence

Awn comb grass is an annual grass that grows in small tufts or with individual stalks. The straws are 15-80 cm tall, are erect, usually branched in the lower part, with 2-4 bare node. The leaf sheaths are bare, the top one is slightly puffed up. The ligule is a 5–10 millimeter long, tongue-shaped edge. The leaf blades are 5–20 centimeters long and 3–9 millimeters wide, spread out flat and very rough. The flower panicle is (without awns) 1–6 centimeters long and 1–2 centimeters wide, egg-shaped, dense and one-sided. The spikelets are always next to a stalked fan of long, empty husks. They are 2–5 flowered, 8–14 millimeters long without awns and compressed laterally. The glumes are almost equal and 6–12 millimeters long. The lemmas are five-nerved, 5–6.5 millimeters long, with a 6–20 millimeter long, thin, straight awn. The palea are two-veined. The anthers are 2–3 millimeters long.

The flowering period is April to July.

The chromosome number is 2n = 14.

distribution

The awn comb grass is originally from the Mediterranean region to the western Himalayas and in Macaronesia. It is a neophyte in North and South America, South Africa, India, Japan, Australia, and New Zealand .

ecology

The awn comb grass occurs in dry meadows, in fields and in ruderal communities . It thrives on warm, dry, weakly acidic, poorly nutrient-rich sandy or clay soils in mild, humid climates in winter. It rises in the Alps to around 2000 meters above sea level.

Taxonomy

The awn comb grass was first described by Carl von Linné in Sp. Pl .: 73, (1753) under the name Cynosurus echinatus . Synonyms of Cynosurus echinatus L. are: Chrysurus echinatus (L.) P.Beauv. Pomel , Cynosurus hystrix , Falona echinata (L.) Dumort. and Cynosurus erroneus Jordan ex Martrin-Donos .

literature

  • Hans Joachim Conert: Cynosurus echinatus . In: Gustav Hegi : Illustrated flora of Central Europe . 3rd ed., Volume I, Part 3, pp. 521-522. Verlag Paul Parey, Berlin, Hamburg 1987, ISBN 3-489-52320-2 (description, distribution, ecology)

Individual evidence

  1. ↑ Cynosurus echinatus at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
  2. ↑ a b Rafaël Govaerts (Ed.): Cynosurus echinatus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved June 24, 2020.