Vegetative Morphology | |
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| Plants | perennial; densely to loosely cespitose, sometimes rhizomatous. |
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| Culms | 25-110 cm. |
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| Sheaths | open. |
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| Auricles | usually present. |
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| Ligules | membranous, often erose. |
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Reproductive Morphology | |
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| Inflorescences | spikes, usually pectinate. |
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| Middle internodes | 0.2-3(5.5) mm. |
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| Spikelets | solitary, usually divergent or spreading from the rachis, with 3-16 florets. |
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| Disarticulation | above the glumes and beneath the florets. |
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| Glumes | shorter than the adjacent lemmas, 1-5-veined, asymmetrically keeled, a secondary keel sometimes present on the wider side. |
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| Glume keels | glabrous or with hairs, hairs not tufted. |
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| Glume awns | present or absent, to 6 mm. |
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| Lemmas | 5-7-veined, asymmetrically keeled, acute to awned. |
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| Lemma awns | to 4.5 mm. |
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| Anthers | 3, 3-5 mm, yellow. |
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| Caryopses | usually falling with the lemmas and paleas attached. |
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Chromosome Number(s)x = 7
Name/Synonymy Publication Info
AGROPYRON Gaertner, Novi Comment. Acad. Sci. Imp. Petrop. 14:539 (1770). Costia Willk., Bot. Zeitung (Berlin) 16:377 (1858), nom. superfl. LEC: Agropyron cristatum (L.) Gaertner [Nash in Britton & A. Br., Ill. fl. n. U.S., ed. 2, 1:283 (1913)]. Treatment FromM.E. Barkworth. Agropyron in Flora of North America, Volume 24. In prep. Oxford University Press.
Fact Sheet Developed ByPedro Oñativia Lake © 2006
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