Thinopyrum intermedium |
Thinopyrum pycnanthum |
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intermediate wheatgrass |
tick quackgrass |
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Habit | Plants perennial, 50–115 cm tall; rhizomatous, glaucous. | |
Culms | glabrous or hairy or occasionally hairy only at the nodes; lowest internode including sheath approximately 3 mm thick. |
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Leaves | ligules 0.1–0.8 mm; blades flat, 2–8 mm wide. |
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Inflorescences | spikes 8–21 cm; middle internodes 7–12 mm; inflorescence axes pubescent. |
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Spikelets | 11–18 mm, 3–10 florets. |
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Glumes | glabrous or with appressed hairs; midvein usually more prominent and longer than the lateral veins; tips obliquely truncate or obtuse to acute or occasionally short-pointed; lower glumes 4.5–7.5 × 1.5–2.5 mm, 5–6-veined; upper glumes 5.5–8 × 2–3 mm, 5–7-veined. |
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Lowest lemmas | 7.5–10 mm, glabrous or with hairs 1–1.5 mm; lemma awns; if present; to 5 mm. |
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Anthers | 5–7 mm. |
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Thinopyrum intermedium |
Thinopyrum pycnanthum |
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Distribution | ||
Discussion | 2 subspecies. Tinopyrum intermedium is a strongly rhizomatous wheatgrass often notable for its bluish coloration. It can be distinguished from other rhizomatous, nearly awnless wheatgrasses by its thick, sti? glumes. In the feld, the rhizomatous growth form is obvious, but this may be hard to determine on collected specimens because the shoots are sometimes clustered, and the narrow rhizomes are often not collected. |
[This taxon does not have a floristic treatment in Flora of Oregon.] |
Source | Flora of Oregon, volume 1, page 484 Barbara Wilson, Richard Brainerd, Nick Otting |
Flora of Oregon, volume 1 |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Agropyron junceum, Agropyron pungens | |
Web links |
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