Lupinus albicaulis |
Lupinus brevicaulis |
|
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Drew's silky lupine, pine lupine, sickle-keel lupine, white stem lupine |
sand lupine, short stem blue lupine, short-stem lupine |
|
Habit | Herbs, perennial, 3–12 dm, puberulent to silky-appressed. | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. |
Stems | ascending-erect, clustered, branched. |
very short, tufted, branched. |
Leaves | cauline; stipules not leaflike, green to silvery, 5–18 mm; petiole 2–7 cm; leaflets 5–10, blades 20–70 × 5–14 mm, adaxial surface pubescent. |
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. |
Racemes | open, 10–44 cm; flowers usually whorled. |
dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
Peduncles | 2–12 cm; bracts deciduous, 6–16 mm. |
1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
Pedicels | 2–7 mm. |
0.3–1.5 mm. |
Flowers | (8–)12–16 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire or 3-toothed, 7–13 mm, adaxial lobe 2-toothed, 6–12 mm; corolla usually purple, rarely yellowish white, banner patch indistinct, banner glabrous abaxially, keel strongly upcurved, glabrous, banner and wings narrow, not covering tip. |
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. |
Legumes | 2–5 cm, silky. |
not undulate, 1 cm, thinly pilose to coarsely hirsute. |
Cotyledons | deciduous, petiolate. |
persistent, disclike, sessile. |
Seeds | 3–7, gray to tan, mottled tan, 4–7 mm. |
1 or 2, smooth. |
2n | = 48. |
|
Lupinus albicaulis |
Lupinus brevicaulis |
|
Phenology | Flowering May–Jul. | Flowering spring. |
Habitat | Dry slopes, sandy prairies, openings of mixed conifer forests, ± montane. | Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. |
Elevation | 500–3000 m. (1600–9800 ft.) | 300–2400 m. (1000–7900 ft.) |
Distribution |
CA; OR; WA
|
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
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Discussion | Lupinus albicaulis ranges from the Cascades in western Oregon and Washington, and in California from the northern North Coast Ranges to the western slope of the Sierra Nevada and southward into the Western Transverse Ranges. Plants with flowers 8–11 mm have been called var. shastensis. (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.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Lupinus | Fabaceae > subfam. Faboideae > Lupinus |
Sibling taxa | ||
Synonyms | L. albicaulis var. bridgesii, L. albicaulis var. shastensis, L. formosus var. bridgesii, L. gormanii, L. ochroleucus, L. pumicola, L. purpurascens, L. shastensis, L. whiltoniae, L. wolfianus | |
Name authority | Douglas in W. J. Hooker: Fl. Bor.-Amer. 1: 165. (1832) | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) |
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