Psilocarphus brevissimus |
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dwarf woolly-heads, dwarf woolly-marbles, Robbin's pondweed, short woollyheads, woolly marbles |
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Habit | Plants greenish to grayish, sericeous to densely lanuginose. | ||||
Stems | (1–)2–10, erect to prostrate; proximal internode lengths mostly 0.5–1.5(–2) times leaf lengths. |
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Receptacles | unlobed or ± lobed. |
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Heads | ± spheric, rarely ovoid, largest 6–14 mm. |
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Cypselae | narrowly obovoid, ± compressed, 0.8–1.9 mm. |
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Capitular | leaves ± erect, appressed to heads (sometimes spreading), linear-lanceolate to ovate, widest in proximal 2/3, longest 8–25 mm, lengths mostly 1.5–6 times widths, 1–2.5(–3) times head heights. |
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Pistillate | paleae hidden by or visible through indument, longest 2.8–4 mm (lengths 1.5–6 times longest diams.; wings subapical to ± median). |
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Staminate | corollas 0.8–1.6 mm, lobes mostly 5. |
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2n | = 28. |
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Psilocarphus brevissimus |
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Distribution |
CA; ID; MT; NV; OR; UT; WA; WY; AB; BC; SK; s South America
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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. 19, p. 458. | ||||
Parent taxa | Asteraceae > tribe Gnaphalieae > Psilocarphus | ||||
Sibling taxa | |||||
Subordinate taxa | |||||
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 340. (1840) | ||||
Web links |
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