Eragrostis
Great love grass ( Eragrostis cilianensis )
The love grass ( Eragrostis ) are a genus within the family of grasses ( Poaceae ). This includes about 350 species worldwide. The German trivial name is a direct translation of the scientific genus name (see below). Some members of the genus belong to a group of cereals, which are summarized under the term " millet ".
- 4.1 Notes and references
Description
Vegetative characteristics
Love grasses are annual or perennial plants. They grow grass -like or occasionally tufted. A few species, such as Eragrostis Eragrostis hypnoides or barbinodis form foothills. The species reach heights of growth between 10 and 300 centimeters. They are mostly herbaceous, occasionally partially woody grasses. The one to zwanzigknotigen blades are predominantly unbranched. The nodes are almost always glabrous; rarely hairy annulata such as in Eragrostis Eragrostis or kennedyae.
The most narrowly linear -shaped leaves and inflorescences are often glandular. The leaf blades are usually rolled flat or rare. The ligule are designed as fine hair ring, sometimes called membranous diaphragm. Rarely are in transition to leaf sheath auricles whose edges are not attached, is formed. The sheaths are keeled or rounded.
Generative features
The inflorescences are open, contracted or spike-like ( Eragrostis chapelieri ) panicles. The laterally compressed, spherical to oblong spikelets are two to many flowered and hermaphrodite. They measure from 1 to 40 mm in length and 0.5 to 8 mm in width. The glumes are often unequal in shape and one-to three annoying. The grannenlosen possibly equipped with a short top and one to five annoying lemmas are usually glabrous, rarely hairy, keeled or rounded on the back. The male flowers have two, for example, Eragrostis ciliaris, until in most cases three stamens. The female flowers have two scars.
The fruits are 0.4 to 2.4 millimeters long caryopses ( seeds), rarely the pericarp is free. The grains are free of all types and are scattered after a crack has developed at the base of holding them lemmas.
Pathway and chromosome sets
It is in all species with the exception of Eragrostis walteri to C4 plants.
The basic chromosome number is x = 10 It ploidy were found with 2n = 20, 40, 50, 60, 80, 100 different.
Dissemination
Love grasses are found worldwide with a focus in the tropics and subtropics. They mostly inhabit sandy or disturbed soils in open spots. Most species are considered to be so-called weeds. A few members of the genus have an economic importance such as the Teff ( Eragrostis tef ) in Ethiopia or the Hairy love grass ( Eragrostis pilosa ) in Central Africa and the Nile countries as corn.
System
The genus Eragrostis was erected in 1776 by Nathanael Matthew Wolf in Genera Plantarum, p 23. The genus name Eragrostis is a word and derives from the Greek word eros love and the middle Latin word agrostis for weeds, or Greek agrostis, the name of several different grasses, from. Synonyms for Eragrostis Wolf are: Boriskellera Terechov, Erochloe Raf, erosion Lunell, Exagrostis Steud. . nom. inval. , Macroblepharus Phil, Psilantha ( K.Koch ) Tzvelev, Roshevitzia Tzvelev, Triphlebia Stapf, Vilfagrostis Doell nom. inval ..
The genus love grass ( Eragrostis Wolf ) belongs to the tribe Eragrostideae in the subfamily Chloridoideae within the family of grasses ( Poaceae ).
In Central Europe, among others, the following species occur, of which several species have been introduced:
- Elbe love grass ( Eragrostis albensis H.Scholz )
- Eragrostis barrelieri Daveau
- Great love grass ( Eragrostis cilianensis ( All. ) Janch. )
- Weak Crooked love grass ( Eragrostis curvula ( Schrad. ) Nees )
- Little love grass ( Eragrostis minor Host)
- Japanese love grass ( Eragrostis multicaulis Steud. )
- Eragrostis neomexicana Vasey ex Beal
- Eragrostis pectinacea ( Michx. ) Nees
- Hairy love grass ( Eragrostis pilosa (L.) P.Beauv. )
- Teff ( Eragrostis tef ( Zucc. ) Trotter )
- Eragrostis virescens J.Presl
Other types (selection):
- Eragrostis amabilis (L.) Wight & Arn.
- Eragrostis annulata Rendle ex Scott Elliott
- Eragrostis barbinodis hack.
- Eragrostis chapelieri ( Kunth ) Nees
- Eragrostis ciliaris (L.) R.Br.
- Eragrostis hypnoides ( Lam.) Britton, Stern & Poggenb.
- Eragrostis kennedyae F.Turner
- Eragrostis variabilis ( Gaudich. ) Steud.
Sources and further information
- Description of the genus Eragrostis in L. Watson and MJ Dallwitz: The Grass Genera Of The World.
- Description of the genus Eragrostis in the Flora of Taiwan.
- Description of the genus Eragrostis in the Flora of China.