Stenotus armerioides |
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ring grass sunflower, thrift mock goldenweed, thrifty goldenweed |
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Habit | Plants cespitose, sometimes densely so, 2–29 cm; taproots stout. | ||||
Stems | proximally clothed with marcescent leaves, usually glabrous, sometimes sparsely scabrous, usually viscid, sometimes eglandular. |
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Leaves | basal; narrowly petiolate; blades, 1- or 3-nerved, linear to narrowly oblanceolate or spatulate, 17–90 × 1–7(–12) mm, rigid, attenuate, margins sometimes ciliate (often minutely), viscid-glandular veins conspicuously raised abaxially, apices acute, faces ± scabrous or glabrous, gland-dotted, viscid. |
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Peduncles | 10–130 mm, smooth and viscid. |
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Involucres | campanulate to hemispheric, 8–21 × 6–14 mm. |
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Ray florets | 5–15; laminae elliptic to oblong, 5.5–18.5 × 2–6 mm. |
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Disc florets | 21–39; corollas funnelform to vase-shaped, 4–9 mm, tubes glabrous or rarely sparsely hairy, lobes 0.7–1.3 mm, ca. 1/8–1/6 length of corollas; anthers 1.8–3.5 mm, style-branch appendages subulate to lanceolate, 1.2–2.3 × 0.5 mm, stigmatic lines 0.6–1.9 mm, 1/2–3/4 as long as style-branch appendages. |
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Phyllaries | 12–26 in 3 series, 1- (or 3)-nerved (often ± keeled), strongly unequal, outer ovate to oblong, 3–8 × 1.5–4(–7.5) mm, inner oblong, 5.5–10 × 1.5–3.5 mm, proximally indurate, distally chartaceous, green portions about as long as broad, margins scarious, sometimes broadly so, entire, apices obtuse to rounded, minutely apiculate, viscid abaxially. |
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Heads | 1–2(–4). |
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Cypselae | 2–6 mm, lengths 1/2–3/4 disc corollas, faces sericeous; pappus bristles 60–75, 3.5–7.5 mm, nearly equaling disc corollas. |
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Stenotus armerioides |
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Distribution |
AZ; CO; KS; MT; ND; NE; NM; SD; UT; WY; SK
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 176. | ||||
Parent taxa | |||||
Sibling taxa | |||||
Subordinate taxa | |||||
Synonyms | Haplopappus armerioides | ||||
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 335. (1840) | ||||
Web links |