Lupinus brevicaulis |
Lupinus sparsiflorus |
|
---|---|---|
sand lupine, short stem blue lupine, short-stem lupine |
Coulter's lupine, Mojave lupine |
|
Habit | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. | Herbs, annual, 1.5–4 dm, strigose, hairs short and appressed, also pilose, hairs long and spreading. |
Stems | very short, tufted, branched. |
ascending or erect, branched or unbranched. |
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; petiole (1–)3–7 cm; leaflets (5–)7–11, blades (7–)15–30(–45) × 2–5 mm, adaxial surface glabrous or pubescent, at least marginally. |
Racemes | dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
10–25 cm; flowers spirally arranged. |
Peduncles | 1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
2–4 cm; bracts usually deciduous, 3–5 mm, shorter than buds. |
Pedicels | 0.3–1.5 mm. |
2–5 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. |
10–12(–13) mm; calyx 3–6 mm, lobes ± equal, abaxial lobe entire, adaxial lobe deeply cleft; corolla usually blue, rarely pinkish, drying darker, banner spot whitish becoming magenta, lower keel margins ciliate near claw, upper margins often ciliate near claw. |
Legumes | not undulate, 1 cm, thinly pilose to coarsely hirsute. |
1–2 cm, coarsely pubescent. |
Cotyledons | persistent, disclike, sessile. |
deciduous, petiolate. |
Seeds | 1 or 2, smooth. |
4 or 5. |
Lupinus brevicaulis |
Lupinus sparsiflorus |
|
Phenology | Flowering spring. | Flowering spring (Mar–May). |
Habitat | Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. | Washes, sandy areas, chaparral, grasslands, coastal sage scrub, Joshua tree/mesquite woodlands, creosote bush scrub. |
Elevation | 300–2400 m. (1000–7900 ft.) | 0–1500 m. (0–4900 ft.) |
Distribution |
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
|
AZ; CA; NV; UT; Mexico (Baja California, Baja California Sur, Sonora)
|
Discussion | Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Plants from the Mojave Desert often have smaller flowers and have been named subsp. mohavensis, and those from western San Diego County with pinkish flowers and truncate leaflets have been named var. inopinatus. (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. pondii, L. sparsiflorus subsp. inopinatus, L. sparsiflorus var. inopinatus, L. sparsiflorus subsp. mohavensis, L. sparsiflorus var. mohavensis, L. sparsiflorus var. pondii | |
Name authority | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) | Bentham: Pl. Hartw., 303. (1849) |
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