Lupinus brevicaulis |
Lupinus formosus |
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sand lupine, short stem blue lupine, short-stem lupine |
summer lupine, western lupine |
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Habit | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. | Herbs, perennial, 12–8 dm, densely hairy to tomentose, gray to silver; rhizomes 3–7 mm diam. | ||||
Stems | very short, tufted, branched. |
ascending, spreading, or erect, branched. |
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Leaves | 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. |
cauline; stipules not leaflike, green to silvery, 4–15 mm; petiole 2–7 cm; leaflets 7–9, blades 25–70 × 6–14 mm, adaxial surface pubescent. |
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Racemes | dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
10–30 cm; flowers ± whorled. |
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Peduncles | 1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
3–7 cm; bracts deciduous, 4–14 mm. |
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Pedicels | 0.3–1.5 mm. |
3–7 mm. |
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Flowers | 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. |
10–18 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire or 3-toothed, 8–12 mm, adaxial lobe 2-toothed, 7–11 mm; corolla purple, banner patch white or not, banner glabrous abaxially, keel upcurved, glabrous, banner ovate, wings wide, covering keel tip. |
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Legumes | not undulate, 1 cm, thinly pilose to coarsely hirsute. |
3–4.5 cm, hairy. |
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Cotyledons | persistent, disclike, sessile. |
deciduous, petiolate. |
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Seeds | 1 or 2, smooth. |
5–7, mottled brown, 4–7 mm. |
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Lupinus brevicaulis |
Lupinus formosus |
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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 |
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
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nw Mexico; California
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Discussion | Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. 11. | FNA vol. 11. | ||||
Parent taxa | Fabaceae > subfam. Faboideae > Lupinus | Fabaceae > subfam. Faboideae > Lupinus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) | Greene: Fl. Francisc., 42. (1891) | ||||
Web links |
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