Home Flora of Pakistan
Home
Name Search
Families
Genera
Species
District Map
Grid Map
Inventory Project
Helictotrichon Besser Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Mantissa 3(Add. 1): 526. 1827. (Mant.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: A genus of about 60 species chiefly in the temperate regions of the northern hemisphere, extending through the African mountains to South Africa and Madagascar; 1 species on mountains in Java and Sumatra; 2 species occur in Pakistan.
Comment/Acknowledgements: The genus resembles Avena, in which it is often included, but the latter are annuals with larger pendulous spikelets and 7-11-nerved glumes. Also similar is Arrhenatherum, but this has mostly 2-flowered spikelets with the lower floret male, and the florets falling together at maturity. Helictotrichon is distinguished from Trisetum by its larger spikelets (over 9 mm) and hairy ovary.

 

Export To PDF Export To Word
Caespitose perennials. Leaf-blades linear, flat or folded, sometimes setaceous. Inflorescence a narrow panicle, erect or nodding. Spikelets 2-6-flowered, the florets similar, bisexual, or the uppermost ± reduced; rhachilla disarticulating below each floret, slender, hairy, produced as a short bristle or ending with a rudimentary lemma; glumes unequal, keeled, hyaline to herbaceous, the lower 1-3-nerved, the upper 3-5-nerved, acute; lemmas narrowly lanceolate in profile, enclosed by or more often exserted from the glumes, herbaceous with hyaline tips and margins, sometimes becoming indurated, 5-11-nerved, bind, geniculately awned from the upper part of the back; palea shorter than the lemma, 2-keeled; stamens 3; stigmas 2.
 

Export To PDF Export To Word Export To SDD
Switch to indented key format
1 Panicle nodding, not contracted, often widely spreading; lower branches more than 3.5 cm long, and sometimes up to 15 cm long, bearing up to 12 spikelets each Helictotrichon virescens
+ Panicle very contracted, spiciform and sparingly branched; lower branches not more than 3.5 cm long and bearing only 1 or 2 spikelets Helictotrichon pratense
 
 
 
© 2020 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110