Lupinus pusillus
Lupinus pusillus var. pusillus
intermountain lupine, low lupine, rusty lupine
rusty lupine
short and tufted or erect, branched from base or near middle.
cauline, often crowded near base;
stipules well developed;
petiole 1–9 cm;
leaflets 5–9, blades 10–40 × 5–10 mm, adaxial surface glabrous.
8–12-flowered, 2–11 cm, shorter than or slightly exceeding foliage;
flowers spirally arranged.
2–11 cm, equal to or longer than foliage.
0–3.5 cm;
bracts persistent, straight, 2–5 mm.
usually 1–3.5 cm.
1–3.5 mm.
strigose.
5–12 mm;
calyx abaxial lobe entire, 5–6 mm, adaxial lobe cleft, 2.5–4 mm;
corolla vivid blue, sometimes paler or white, sometimes bicolored, banner spot white or yellowish, keel glabrous.
7–12 mm, relatively large;
calyx tube strigose.
1.5 cm, constricted between seeds, thinly pilose to coarsely hirsute.
persistent, disclike, sessile.
2, wrinkled or ridged.
= 48.
Lupinus pusillus
Lupinus pusillus var. pusillus
Varieties 3 (3 in the flora).
Lupinus pusillus is a highly variable species, with the varieties intergrading.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
In Arizona, var. pusillus is known across the northern part of the state where it may be locally common.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Peduncles 0–1 cm; racemes shorter than foliage; flowers 6–8 mm. | var. intermontanus |
1. Peduncles usually 1–3.5 cm; racemes equal to or longer than foliage; flowers 7–12 mm. | → 2 |
2. Pedicels and calyx tubes strigose. | var. pusillus |
2. Pedicels and calyx tubes glabrous. | var. rubens |
OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
KS Wildflowers
