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Hyparrhenia
Family: Poaceae
Hyparrhenia image
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Mary E. Barkworth. Flora of North America
Plants annual or perennial; cespitose, often with short rhizomes. Culms 30-350(400) cm, usually erect, much branched above the bases. Leaves not aromatic; ligules membranous, not ciliate; blades usually flat or folded. Inflorescences false panicles with numerous inflorescence units; peduncles with 2 rames in digitate clusters; rames with naked, often deflexed bases, axes without a translucent median groove; disarticulationin the rames, beneath the bisexual spikelets. Spikelets in sessile-pedicellate pairs, basal 1-2 pairs on each rame homogamous, morphologically similar to the heterogamous pairs, staminate or sterile, unawned, not forming an involucre, tardily deciduous, remaining pairs heterogamous. Heterogamous spikelet units: sessile spikelets dorsally compressed or subterete; calluses blunt to sharp, strigose; glumes equal, pubescent; lower glumes coriaceous, rounded, without keels, truncate to slightly bilobed; upper glumes narrower, shallowly keeled; lower florets sterile, reduced; upper florets bisexual, awned from between the teeth of the bifid lemma; awns usually present, to 3.5(19) cm, pubescent on the lower portion. Caryopses oblong, subterete. Pedicels slender, not adnate to the rame axes. Pedicellate spikelets usually slightly longer than the sessile spikelets, staminate or sterile, usually unawned, lower glumes sometimes aristulate. x = 10, 15. Name from the Greek hypo, under, and arrhen, masculine, referring to the pair of staminate spikelets at the base of the rames of some species.
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Species within inventory project:
Hyparrhenia anthistirioides
Images
not available
Hyparrhenia bracteata
Image of Hyparrhenia bracteata
Hyparrhenia buchanani
Image of Hyparrhenia buchanani
Hyparrhenia claessensii
Images
not available
Hyparrhenia cymbaria
Image of Hyparrhenia cymbaria
Hyparrhenia diplandra
Images
not available
Hyparrhenia dregeana
Images
not available
Hyparrhenia familiaris
Images
not available
Hyparrhenia filipendula
Image of Hyparrhenia filipendula
Hyparrhenia hirta
Image of Hyparrhenia hirta
Hyparrhenia lithophila
Images
not available
Hyparrhenia macrolepis
Images
not available
Hyparrhenia newtonii
Image of Hyparrhenia newtonii
Hyparrhenia nyassae
Image of Hyparrhenia nyassae
Hyparrhenia pilgeriana
Images
not available
Hyparrhenia rufa
Image of Hyparrhenia rufa
Hyparrhenia subplumosa
Image of Hyparrhenia subplumosa
Hyparrhenia variabilis
Image of Hyparrhenia variabilis
Hyparrhenia vulpina
Images
not available
Hyparrhenia welwitschii
Image of Hyparrhenia welwitschii
Hyperthelia dissoluta
Image of Hyperthelia dissoluta
The National Science Foundation
Developments of SEINet, Symbiota, and associated specimen databases have been supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)