Lupinus sulphureus |
Lupinus brevicaulis |
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Kincaid's lupine, sulfur lupine, sulphur lupine |
sand lupine, short stem blue lupine, short-stem lupine |
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Habit | Herbs, perennial, (3–)4–8(–10) dm, hairs stiff to silky-appressed, whitish, grayish, or brownish. | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. | ||||
Stems | erect, densely tufted, unbranched distally. |
very short, tufted, branched. |
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Leaves | basal and cauline, persisting until after flowering; stipules 4–8 mm; proximal petioles 4–20 cm, distal ones 1.5–5 cm; leaflets 6–15, blades white to greenish, (20–)25–70 × 4–10 mm, abaxial surface hairy-strigulose or sericeous, adaxial surface strigulose-silky to sparsely hairy or glabrous. |
cauline, crowded near base; stipules well developed; petiole 1–6 cm; leaflets (3 or)5–9, blades 8–20 × 2–9 mm, adaxial surface glabrous. |
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Racemes | 6–20 cm; flowers whorled or spirally arranged. |
dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
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Peduncles | 2.5–6 cm; bracts tardily deciduous, 5–9 mm. |
1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
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Pedicels | (2–)4–10 mm. |
0.3–1.5 mm. |
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Flowers | 8–12 mm; calyx asymmetrical but not spurred, silky, abaxial lobe entire, 4–7 mm, adaxial lobe 2-fid, 3–5 mm; corolla pale sulfur yellow, blue, or white, banner glabrous or sparsely hairy abaxially (pubescence extending above calyx as a line), upper keel margins usually ciliate most of length, sometimes glabrous. |
6–8 mm; calyx abaxial lobe entire or shallowly cleft, ± 6 mm, adaxial lobe 2-toothed, 3 mm, less than 1/2 as long as abaxial; corolla bright blue, banner spot white or yellow, keel glabrous. |
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Legumes | 2–3 cm, pilose to silky. |
not undulate, 1 cm, thinly pilose to coarsely hirsute. |
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Cotyledons | deciduous, petiolate. |
persistent, disclike, sessile. |
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Seeds | 4 or 5, pinkish brown. |
1 or 2, smooth. |
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Lupinus sulphureus |
Lupinus brevicaulis |
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Phenology | Flowering spring. | |||||
Habitat | Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. | |||||
Elevation | 300–2400 m. (1000–7900 ft.) | |||||
Distribution |
w North America
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AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller. (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 > Lupinus | Fabaceae > subfam. Faboideae > Lupinus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Douglas in W. J. Hooker: Fl. Bor.-Amer. 1: 166. (1832) | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) | ||||
Web links |