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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 to perennial herb, cespitose, occasionally from short rhizomes. Stem: decumbent to erect, generally abruptly bent at base; nodes glabrous or pubescent. Leaf: sheath glabrous or hairy; ligules translucent; auricles present or 0; blade flat or +- rolled. Inflorescence: spike-like, dense; axis breaking apart at nodes at maturity (except in Hordeum vulgare); spikelets 2-ranked, strongly overlapping, 3 per node (central + 2 lateral). Central Spikelet: bisexual, generally sessile; with 1 stalked or sessile floret; glumes awn-like, generally > floret; lemma awned.Lateral Spikelet: sterile or staminate (bisexual in Hordeum vulgare), generally short-stalked; floret 1, sessile; glumes awn-like, > floret, lemma generally awned.
Species In Genus: 32 species: temperate worldwide except Australia. Etymology: (Latin: ancient name for barley) Note: As treated here, including Critesion. Hybridizes with Elymus to produce ×Elyhordeum species. Source of edible grains, sugar, ornamental, and weeds; enzymes from sprouts used in beer-making. Lemma or floret measurements do not include awns. Hordeum pusillum Nutt. has been reported for Ventura and San Diego cos., but it does not appear to be naturalized.
eFlora Treatment Author: James P. Smith, Jr.
Jepson Online Interchange
Key to HordeumPrevious taxon: Holcus mollis
Next taxon: Hordeum arizonicum
Citation for this treatment: James P. Smith, Jr. 2016. Hordeum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11082, accessed on April 30, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on April 30, 2016.