Eragrostis cilianensis |
Eragrostis plana |
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stinkgrass |
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Habit | Plants annual, 15–45(65) cm tall, tufted. | |
Culms | erect or decumbent, sometimes with saucer-like glands below the nodes. |
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Leaves | sheaths glabrous or occasionally glandular; tops with hairs to 5 mm; blades (1)5–20 cm × (1)3–5(10)mm; lower surfaces glabrous or sometimes glandular; margins with conspicuous glands. |
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Inflorescences | (3)5– 16(20) × 2–8.5 cm, oblong to ovate, condensed to open; primary branches 0.4–5 cm, appressed or diverging 20–80° from the inflorescence axis; pedicels 0.2–3 mm; stout; straight; stiff, usually divergent, occasionally appressed; disarticulation below the florets; each floret falling as a unit; rachillas persistent. |
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Spikelets | 6–20 × 2–4 mm, gray or greenish, 10–40 florets. |
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Glumes | broadly ovate to lanceolate, membranous, usually glandular; lower glumes 1.2–2 mm, usually 1-veined; upper glumes 1.2–2.6 mm, usually 3-veined. |
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Caryopses | 0.5–0.7 mm, globose to broadly ellipsoid, not grooved. |
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Lemmas | 2–2.8 mm, broadly ovate, membranous; keels with 1–3 saucer-like glands, obtuse to acute. |
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Paleas | 1.2–2.1 mm; hyaline; keels scabrous or sometimes also ciliate. |
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Anthers | 3, 0.2–0.5 mm, yellow. |
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2n | =20. |
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Eragrostis cilianensis |
Eragrostis plana |
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Distribution | ||
Discussion | Disturbed sites, roadsides. 0–1700m. BR, Col, ECas, Est, Lava, Owy, Sisk, WV. CA, ID, NV, WA; throughout most of North America; Europe. Exotic. Eragrostis cilianensis has large, dense inflorescences that seem too large for the small plants. As the common name suggests, it has an unpleasant odor. It also differs from the other weedy annual Eragrostis in having globose caryopses, yellow anthers, often ciliate paleas and wider spikelets. |
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Source | Flora of Oregon, volume 1, page 404 Barbara Wilson, Richard Brainerd, Nick Otting |
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Sibling taxa | ||
Web links |
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