Lupinus arbustus |
Lupinus ludovicianus |
|
---|---|---|
grassland lupine (ssp. neolaxiflorus), long-spur lupine, Montana lupine (ssp. pseudoparviflorus), spur lupine |
San Luis lupine, San Luis obispo county lupine |
|
Habit | Herbs, perennial, 2–7 dm, green or gray-silky. | Herbs, perennial, 3–6 dm, woolly-tomentose. |
Stems | erect, ascending, or decumbent, branched. |
decumbent or erect, branched just above ground, hairs less than 1 mm, not sharp or stiff. |
Leaves | cauline and basal; stipules 4–9 mm; petiole 2–16 cm; leaflets 7–10(–13), blades 20–70 × 3–15 mm, adaxial surface strigose. |
cauline, clustered at base; stipules 7–12 mm; petiole 5–12 cm; leaflets 5–9, blades 15–40 × 5–12 mm, adaxial surface densely tomentose to woolly, hairs ± spreading. |
Racemes | open, 3–18 cm; flowers whorled. |
10–40 cm; flowers ± whorled or not. |
Peduncles | 2–5 cm; bracts deciduous, 3–6 mm. |
stout, 6–10 cm; bracts deciduous, 7–8 mm. |
Pedicels | 1–7 mm. |
2–5 mm. |
Flowers | 8–14 mm; calyx spur distinct, 1–3 mm, abaxial lobe 3-toothed, 2.5–5 mm, 1–3 mm, adaxial lobe 2-toothed, 2–4 mm; corolla blue, purple, pink, white, or yellowish, banner patch white, yellowish, or absent, banner hairy abaxially, wings with dense hair patch outside near tip, lower keel margins glabrous, adaxial margin ciliate. |
10–15 mm; calyx bulge or spur 0–1 mm, abaxial lobe 3-toothed, 6–8 mm, adaxial lobe deeply notched, 6–7 mm; corolla bluish to purple, banner patch yellow turning purple to white, banner well reflexed-recurved at or proximal to midpoint, this 3.5–6 mm proximal to apex, banner glabrous or ± hairy abaxially, lower keel margins glabrous, adaxial margin ciliate middle to tip. |
Legumes | 2–3 cm, silky. |
2–3 cm, hairy. |
Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
Seeds | 3–6, tan, 5–6 mm. |
3 or 4, mottled grayish, 4–7 mm. |
Lupinus arbustus |
Lupinus ludovicianus |
|
Phenology | Flowering May–Jul. | Flowering Apr–Jul. |
Habitat | Open sagebrush scrub or mixed-conifer forests. | Open, grassy areas, on limestone and sandstone, oak woodlands. |
Elevation | 1500–3000 m. [4900–9800 ft.] | 50–600 m. [160–2000 ft.] |
Distribution |
CA; ID; MT; OR; UT; WA; BC
|
CA |
Discussion | Lupinus arbustus is known from the Cascade and Klamath ranges, San Gabriel Mountains, Sierra Nevada, and the Great Basin area in California; Owyhee Desert in Idaho and Oregon; eastern Washington and western Montana; and western Juab and Tooele counties, Utah. Lupinus arbustus is separated from the argenteus group by the presence of hairs on the corolla wings. Recognition of subspecies and varieties of this already complex species leads to precarious separation among taxa. Lupinus variegatus A. Heller (1912, not Poiret 1814) is an illegitimate name that pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lupinus ludovicianus is known only from San Luis Obispo County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | L. arbustus subsp. calcaratus, L. arbustus var. montanus, L. arbustus subsp. neolaxiflorus, L. arbustus subsp. pseudoparviflorus, L. arbustus subsp. silvicola, L. caesius, L. caudatus var. submanens, L. caudatus var. subtenellus, L. elegantulus, L. inyoensis var. demissus, L. laxiflorus var. calcaratus, L. laxiflorus var. cognatus, L. laxiflorus var. elmerianus, L. laxiflorus var. lyleianus, L. laxiflorus var. pseudoparviflorus, L. laxiflorus var. silvicola, L. laxiflorus var. villosulus, L. lyleianus, L. mucronulatus var. umatillensis, L. multitinctus, L. noldekeae, L. proteanus, L. pseudoparviflorus, L. silvicola, L. wenatchensis, L. yakimensis | |
Name authority | Douglas: Edwards’s Bot. Reg. 15: plate 1230. (1829) | Greene: Bull. Calif. Acad. Sci. 1: 184. (1885) |
Web links |
|