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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Poaceae (Gramineae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Annual, perennial herb. Stem: ascending to erect, generally clumped. Leaf: generally basal and cauline; ligule membranous, obtuse to truncate, toothed, tip ciliate or not; blade flat to inrolled. Inflorescence: panicle- to spike-like, open to compact, cylindric to narrowly conic. Spikelet: glumes +- unequal, generally <= lower floret, keeled, acute, lower 1-veined, upper 3-veined; axis stiff- to soft-hairy, generally prolonged behind upper floret, bristly or with vestigial floret; florets 2--3, bisexual, breaking above glumes and between florets (sometimes below glumes); callus short-hairy; lemma +- keeled, tip 2-bristled or not, awned on back near tip or not, awn straight or wavy to bent; palea = or < lemma; ovary glabrous or with short, stiff hairs at tip.
Species In Genus: 70--75 species: worldwide (except Africa) temperate, subarctic, alpine. Etymology: (Latin: 3 bristles, from its 3-awned lemma) Note: Some species intergrade; needs study in western North America. Trisetum flavescens (L.) P. Beauv. extirpated, last collected in California 1917.
eFlora Treatment Author: Robert E. Preston & Dieter H. Wilken
Jepson Online Interchange
Key to TrisetumPrevious taxon: Tridens muticus var. muticus
Next taxon: Trisetum canescens
Citation for this treatment: Robert E. Preston & Dieter H. Wilken 2016. Trisetum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11196, accessed on December 10, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 10, 2016.