Lupinus brevicaulis |
Lupinus peirsonii |
|
---|---|---|
sand lupine, short stem blue lupine, short-stem lupine |
long lupine, Peirson's lupine |
|
Habit | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. | Herbs, perennial, 3–6 dm, silver-silky. |
Stems | very short, tufted, branched. |
erect, branched from just above ground. |
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, clustered at base, ± fleshy; stipules 15–20 mm; petiole 2–15 cm; leaflets 5–8, blades widely oblanceolate, 25–70 × 10–30 mm, surfaces silver-silky. |
Racemes | dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
1–1.5 cm; flowers ± whorled. |
Peduncles | 1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
1–2.5 cm; bracts deciduous, 5–7 mm. |
Pedicels | 0.3–1.5 mm. |
1–2 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 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire, 5–7 mm, adaxial lobe obscurely 2-toothed, 4–6 mm; corolla yellow, banner usually hairy abaxially, lower keel margins glabrous, adaxial margin ciliate middle to tip. |
Legumes | not undulate, 1 cm, thinly pilose to coarsely hirsute. |
3–4 cm, silky. |
Cotyledons | persistent, disclike, sessile. |
deciduous, petiolate. |
Seeds | 1 or 2, smooth. |
3–5. |
Lupinus brevicaulis |
Lupinus peirsonii |
|
Phenology | Flowering spring. | Flowering Apr–Jun. |
Habitat | Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. | Gravelly or rocky areas, Joshua tree woodland, montane coniferous forests, pinyon and juniper woodlands. |
Elevation | 300–2400 m. (1000–7900 ft.) | 1000–2500 m. (3300–8200 ft.) |
Distribution |
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
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CA
|
Discussion | Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lupinus peirsonii is known only from the San Gabriel Mountains in Los Angeles County. (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 | ||
Name authority | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) | H. Mason: Madroño 1: 187. (1928) — (as peirsoni) |
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