Lupinus pusillus var. pusillus
Lupinus pusillus
rusty lupine
intermountain lupine, low 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.
2–11 cm, equal to or longer than foliage.
8–12-flowered, 2–11 cm, shorter than or slightly exceeding foliage;
flowers spirally arranged.
usually 1–3.5 cm.
0–3.5 cm;
bracts persistent, straight, 2–5 mm.
strigose.
1–3.5 mm.
7–12 mm, relatively large;
calyx tube 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.
1.5 cm, constricted between seeds, thinly pilose to coarsely hirsute.
persistent, disclike, sessile.
2, wrinkled or ridged.
= 48.
Lupinus pusillus var. pusillus
Lupinus pusillus
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.)
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.)
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 |
KS Wildflowers
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
OR
WA
Flora NW
