Hyparrhenia
The plant genus Hyparrhenia belongs to the family of the sweet grasses ( Poaceae ). It includes about 50 species of high grass open savannas.
Description
The species are mostly perennial Hyparrhenia ( 40 species ), rarely annuals (16 species) herbaceous plants. These grasses usually form no ( 42 species ), some types of short ( 12 species ) or only two kinds of long rhizomes. Often there are buttress roots for the most long upright stalks.
The inflorescence consists mostly of racemose inflorescences with part usually only a few spikelets that stand together in pairs and in turn are part of a multi-branched panicle wrong with bracts contained therein. One of the two part racemose inflorescences is significantly shorter than the other. Within the part of inflorescences is ever a sitting spikelets with long awns a pedicled over, the spikelets at the base, however, are designed differently and at the top there are two stalked spikelets to pages of a seated spikelet.
Within the spikelet is just a single flower with three stamens. The lemma of this flower is awned at the seated spikelets, the awn is very strong and knelt.
Dissemination
All Hyparrhenia species occur in Africa, where the spread of focus in the Sudano - Zambian savanna lies. However, the proliferation of Hyparrhenia hirta ranges to southern Europe and the Middle East to India. Some species reach to Australia, or were, like, introduced Hyparrhenia rufa to tropical America. Hyparrhenia rufa has also been introduced to Hawaii as a pasture grass and behaves there, especially after fires, as invasive Article The same applies to Hyparrhenia hirta in Australia.
System
The genus belongs to the tribe Hyparrhenia Andropogoneae in the subfamily Panicoideae within the family of grasses ( Poaceae ).
There are slightly more than 50 Hyparrhenia species.,
- Hyparrhenia anamesa
- Hyparrhenia andongensis
- Hyparrhenia Anemopaegma
- Hyparrhenia anthistirioides
- Hyparrhenia arrhenobasis
- Hyparrhenia bagirmica
- Hyparrhenia barteri
- Hyparrhenia bracteata
- Hyparrhenia claytonii
- Hyparrhenia coleotricha
- Hyparrhenia collina
- Hyparrhenia confinis
- Hyparrhenia coriacea
- Hyparrhenia cyanescens
- Hyparrhenia cymbaria
- Hyparrhenia dichroa
- Hyparrhenia dregeana
- Hyparrhenia dybowskii
- Hyparrhenia exarmata
- Hyparrhenia familiaris
- Hyparrhenia figariana
- Hyparrhenia filipendula
- Hyparrhenia finitima
- Hyparrhenia formosa
- Hyparrhenia gazensis
- Hyparrhenia glabriuscula
- Hyparrhenia gossweileri
- Hyparrhenia griffithii
- Hyparrhenia hirta
- Hyparrhenia involucrata
- Hyparrhenia madaropoda
- Hyparrhenia mobukensis
- Hyparrhenia multiplex
- Hyparrhenia neglecta
- Hyparrhenia newtonii
- Hyparrhenia niariensis
- Hyparrhenia papillipes
- Hyparrhenia pilgeriana
- Hyparrhenia pilosa
- Hyparrhenia poecilotricha
- Hyparrhenia praetermissa
- Hyparrhenia quarrei
- Hyparrhenia rudis
- Hyparrhenia rufa
- Hyparrhenia schimperi
- Hyparrhenia smithiana
- Hyparrhenia subplumosa
- Hyparrhenia tamba
- Hyparrhenia tuberculata
- Hyparrhenia umbrosa
- Hyparrhenia variabilis
- Hyparrhenia violascens
- Hyparrhenia welwitschii
Use
Some species of the genus are used in southern Africa for covering straw roofs (hence the English name thatching grass ). In addition, the genus in many tropical and subtropical regions plays an important role as a pasture grass.