Lupinus brevicaulis |
Lupinus sabineanus |
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sand lupine, short stem blue lupine, short-stem lupine |
Sabin's lupine, Sabine's lupine |
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Habit | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. | Herbs, perennial, (5–)6–12 dm, woody, hairs stiff to short-silky-appressed. |
Stems | very short, tufted, branched. |
erect or ascending, clustered, unbranched or branched distally, stout. |
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 10–15 mm; petiole 2–25 cm; leaflets 8–11, blades (30–)60–120(–150) × 3–15 mm, abaxial surface silky, slightly less so abaxially. |
Racemes | dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
12–40 cm, loose to dense; flowers whorled. |
Peduncles | 1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
4–10 cm; bracts early deciduous to persistent, 10–18 mm. |
Pedicels | 0.3–1.5 mm. |
4–12 mm. |
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. |
(13–)15–18 mm; calyx sometimes somewhat bulged and asymmetrical, abaxial lobe entire or notched, 7–8 mm, adaxial lobe shallowly notched, 6–7 mm; corolla bright yellow, rarely pale purple, keel falcate, banner glabrous or hairy abaxially, upper keel margins densely ciliate. |
Legumes | not undulate, 1 cm, thinly pilose to coarsely hirsute. |
3–4.5 cm, tomentose. |
Cotyledons | persistent, disclike, sessile. |
deciduous, petiolate. |
Seeds | 1 or 2, smooth. |
4–7, pinkish brown to dull reddish brown, 6–7 mm. |
Lupinus brevicaulis |
Lupinus sabineanus |
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Phenology | Flowering spring. | Flowering May–early Jun. |
Habitat | Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. | Open ponderosa pine forests, dry hillsides, open woods. |
Elevation | 300–2400 m. (1000–7900 ft.) | 500–1200 m. (1600–3900 ft.) |
Distribution |
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
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OR; WA |
Discussion | Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lupinus sabineanus is known only from the Blue Mountains of northeastern Oregon and southeastern Washington (where it is of conservation concern). (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. sabinei | |
Name authority | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) | Douglas ex Lindley: Edwards’s Bot. Reg. 17: plate 1435. (1831) — (as sabinianus) |
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