Lupinus arcticus |
Lupinus malacophyllus |
|
---|---|---|
arctic lupine |
jawleaf lupine |
|
Habit | Herbs, perennial, 1–4 dm, hairs thinly appressed silky-sericeous, or few to many and spreading; caudex superficial, divisions closely tufted. | Herbs, annual, 0.7–1.6 dm, softly villous, with fine, spreading hairs, hairs more than 1 mm. |
Stems | ascending to erect, hollow, tufted, branched at crown. |
ascending or erect, branched or unbranched. |
Leaves | mostly basal with a few cauline proximal to inflorescences; stipules 8–10 mm; petiole 5–19 cm; leaflets 6–10, blades 13–90 × 10–15 mm, abaxial surface thinly strigose, adaxial surface glabrous. |
basal and cauline; stipules well developed; petiole 1.5–4.5 cm; leaflets 5–7, blades 7–22 × 3–6 mm, adaxial surface softly villous. |
Racemes | 5–8(–15 in fruit) cm; flowers spirally arranged or in 3–7 whorls. |
well exserted, several–many-flowered, 3–7 cm; flowers crowded, whorled proximally, becoming spirally arranged distally. |
Peduncles | 4–8.5 cm; bracts caducous to tardily deciduous, 8–14 mm. |
2–5.5 cm; bracts persistent, 5–7 mm. |
Pedicels | 4–6 mm. |
2–4 mm. |
Flowers | 14–19(–21) mm; calyx bulge or spur 0–1 mm, abaxial lobe 6–11 mm, entire or faintly notched at tip, adaxial lobe ± gibbous basally, adaxial lobe teeth with slight notch at tip, 4–8 mm; corolla usually blue to purplish, sometimes pink, rarely white, banner spot white or yellow, sometimes becoming purple, banner glabrous abaxially, lower keel margins densely ciliate near claw or glabrous or sparsely ciliate towards tip, adaxial margin glabrous or sparsely ciliate towards tips. |
8–10 mm; calyx 5–8 mm, lobes unequal, adaxial lobe less than 1/2 as long as abaxial; corolla blue or whitish and blue-tipped, keel glabrous. |
Legumes | 2–4.3 cm, silky-pilose. |
not obviously undulate, 1–1.3 cm, softly villous-pilose. |
Cotyledons | deciduous, petiolate. |
persistent or deciduous, disclike, sessile, leaving a circular scar. |
Seeds | 5–8, mottled. |
2. |
2n | = 48. |
|
Lupinus arcticus |
Lupinus malacophyllus |
|
Phenology | Flowering Jun–Aug. | Flowering spring–early summer (mid Apr–Jun). |
Habitat | Well-drained hummocks of alpine and arctic tundra, moist to mesic meadows, gravel bars, clearings, roadsides, thickets, open forests. | Colonial in openings among sagebrush on sandy or gravelly flats and foothill slopes. |
Elevation | 0–2000 m. (0–6600 ft.) | 1400–1800 m. (4600–5900 ft.) |
Distribution |
AK; BC; NT; NU; YT
|
NV |
Discussion | The relationship between Lupinus arcticus and L. latifolius is unclear. They may be distinguished by the presence of proximal keel ciliation in L. latifolius, and basal rather than cauline leaves dominating in L. arcticus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lupinus malacophyllus is known from Washoe and adjacent counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | L. borealis, L. donnellyensis, L. gakonensis, L. multicaulis, L. multifolius, L. nootkatensis var. kjellmannii, L. polyphyllus subsp. arcticus, L. toklatensis, L. yukonensis | |
Name authority | S. Watson: Proc. Amer. Acad. Arts 8: 526. (1873) | Greene: Pittonia 1: 215. (1888) |
Web links |