Psorothamnus polydenius |
Psorothamnus emoryi |
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dotted dalea, Nevada dalea |
dyebush, Emory's indigo bush |
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Habit | Shrubs. | |||||
Stems | 4–10(–15) dm, densely gland-dotted when young, silky-pilosulous, hairs retrorse. |
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Branches | divaricate; sterile shoots almost sharp-tipped. |
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Leaves | pinnate, 0.7–2.7 cm; leaflets 7–13, blades obovate to suborbiculate, 1–4.5 mm, terminal leaflet shorter than laterals, surfaces with submarginal and apical glands abaxially, glands visible, pubescent. |
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Racemes | dense to relatively loose; rachis not spine-tipped in anthesis, 0.3–3 cm; bracts lanceolate or linear-lanceolate, 1.6–6.5 mm; bracteoles absent. |
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Flowers | calyx 3.9–5.3(–8.3) mm, pilosulous throughout or tube glabrous, tube 1.9–2.8(–3) mm, ribs prominent, intervals each with 1 row of 2–6 glands, lobes triangular-lanceolate to lanceolate, abaxial lobe longer; corolla pink-purple, banner with yellow eye; banner 4.6–6.1(–6.6) mm, ovate-cordate, ovate, base cordate, apex emarginate, claw linear; wings oblong, 4–5(–5.4) × 1.5–2.1 mm; keel obovate, (3.7–)4–5.3 × 2.4–3.7 mm; stamens 5.2–6.8 mm; filaments distinct to (1.5–)2–3 mm; anthers (0.5–)0.6–0.8(–1) mm, connective gland-tipped. |
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Legumes | obliquely obovoid, 2.5 mm, with large glands distally, glabrous proximally, sparsely pilosulous distally. |
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Seeds | 2–2.5 mm. |
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a | small-flowered plant, var. arenarius (Brandegee) Barneby is known from the Baja California peninsula. |
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Psorothamnus polydenius |
Psorothamnus emoryi |
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Distribution |
sw United States
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sw United States; nw Mexico
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (1 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. 11. | FNA vol. 11. | ||||
Parent taxa | Fabaceae > subfam. Faboideae > Psorothamnus | Fabaceae > subfam. Faboideae > Psorothamnus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Dalea polydenia | Dalea emoryi | ||||
Name authority | (Torrey) Rydberg in N. L. Britton et al.: N. Amer. Fl. 24: 46. (1919) — (as polyadenius) | (A. Gray) Rydberg in N. L. Britton et al.: N. Amer. Fl. 24: 47. (1919) | ||||
Web links |