Ostrich grasses

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Ostrich grasses
Agrostis scabra

Agrostis scabra

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sweet grasses (Poaceae)
Subfamily : Pooideae
Genre : Ostrich grasses
Scientific name
Agrostis
L.

The ostrich grasses ( Agrostis ) are a genus of plants within the sweet grass family (Poaceae). The approximately 220 species are distributed almost worldwide in sub- arctic to temperate areas and in mountainous regions of the tropics .

description

Detail of the ligule of the giant ostrich grass ( Agrostis gigantea )
Caryopses of Agrostis vinealis
Dog ostrich ( Agrostis canina )
Illustration of the red ostrich grass ( Agrostis capillaris )
Illustration from Aquatic and wetland plants of southwestern United States , 1972 by Agrostis exarata
Illustration of Agrostis hyemalis

Vegetative characteristics

Ostrich grass species are perennial herbaceous plants . These grasses, which are not reed-like, grow clump-forming and they form short subterranean runners and do not become larger than 1 meter. The linear foliage leaves are 5 to 11 mm wide and the youngest leaves appear rolled and not folded when cut open. The often clearly grooved, glabrous, rigid leaves have a hairless leaf sheath and quite long, pointed ligules.

Generative characteristics

The paniculate inflorescences are mostly yellowish or reddish in color, but there are also green colored ones. The lower panicle branches appear to be three or more in the panicle axis, but there are only two basal branches. The spikelets are single-flowered, very fine, not awned, stalked and individually standing, and they appear compressed from the side. The spikelet axis is also glabrous and not hairy. There are no empty husks between the glume and lemma.

Systematics and distribution

Agrostis subulata , illustration

The genus Agrostis was established by Carl von Linné in 1753. Synonyms for Agrostis L. nom. cons. are: Vilfa Adans. nom. superflat., Agraulus P.Beauv. , Agrestis Bubani , Anomalotis Steud. , Bromidium Nees & Meyen , Candollea Steud. , Decandolia T. Bastard , Didymochaeta Steud. , Neoschischkinia Tzvelev , Notonema Raf. , Pentatherum Nábelek , Podagrostis (Griseb.) Scribn. & Merr. , Senisetum Honda , Trichodium Michx. , Linkagrostis Romero García .

The approximately 220 species are distributed almost worldwide in sub- arctic to temperate areas and in mountainous regions of the tropics . It is noteworthy that even remote small islands such as the island in the southern Atlantic Ocean Inaccessible Island , which is included in Tristan da Cunha , even has six rare agrostis species.

In Germany, about eleven species occur: reed bent grass or Tender bent grass ( Agrostis agrostiflora ), alpine bent grass ( Agrostis alpina ), Agrostis canina or marsh bent grass ( Agrostis canina ), Red bent grass ( Agrostis capillaris ), Castilian bentgrass ( Agrostis castellana ), giant ostrich grass ( Agrostis gigantea ), rock ostrich grass ( Agrostis rupestris ), rough ostrich grass ( Agrostis scabra ), Schleicher's ostrich grass ( Agrostis schleicheri ), white ostrich grass ( Agrostis stolonifera ), sand ostrich grass ( Agrostis ).

There are around 220 Agrostis species worldwide (here with details of their home areas):

The following is no longer included in the genus Agrostis :

use

The white ostrich grass ( Agrostis stolonifera ) has a meaning as sport turf, i.e. H. on golf greens, as it can be cut back to 4 millimeters in length.

swell

Individual evidence

  1. a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu bv bw bx by bz ca cb cc cd ce cf cg ch ci cj ck cl cm cn co cp cq cr cs ct cu cv cw cx cy cz da db dc dd de df dg dh di dj dk dl dm dn do dp dq dr ds dt du dv dw dx dy dz ea eb ec ed ee ef eg eh ei ej ek el em en eo ep eq er es et eu ev ew ex ey ez fa fb fc fd fe ff fg fh fi fj fk fl fm fn fo fp fq fr fs ft fu fv fw fx fy fz ga gb gc gd ge gf gg gh gi gj gk gl gm gn go gp gq gr gs gt gu gv gw gx gy gz ha hb hc hd he hf hg hh hi hj hk hl hm hn ho hp hq hr hs ht hu hv hw Rafaël Govaerts (Ed.): Agrostis. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved August 24, 2018.
  2. Walter Erhardt , Erich Götz, Nils Bödeker, Siegmund Seybold: The great zander. Encyclopedia of Plant Names. 2. Volume types and varieties. Eugen Ulmer, Stuttgart (Hohenheim) 2008, ISBN 978-3-8001-5406-7 , p. 1187.
  3. ^ Angiosperm Phylogeny Website .
  4. a b c d e f g h i j k l m n o p q r s Sheng-lian Lu, Sylvia M. Phillips: Agrostis , pp. 340–347 - online with the same text as the printed work , In: Wu Zheng-yi , Peter H. Raven, Deyuan Hong (Eds.): Flora of China. Volume 22: Poaceae , Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 2006, ISBN 1-930723-50-4 .

further reading

Web links

Commons : Ostrich Grasses ( Agrostis )  - Collection of images, videos and audio files