Wednesday, March 20, 2019

Lupinus albifrons (Silver Bush Lupine)

3/1/19 Walker Canyon Trail, Temescal Mountains, Lake Elsinore,
Riverside County, CA


COMMON NAME: Silver Bush Lupine

SPECIES: Lupinus albifrons

FAMILY: Fabaceae (Pea Family)


LOCATION: Walker Canyon Trail, Temescal Mountains, Lake Elsinore, Riverside County, CA

Treatment from Jepson eFlora:

Habit: Subshrub, shrub, < 50 dm, hairy, generally silver (+- green). 

Stem: decumbent to erect. 

Leaf:, clustered near base or not, hairy; stipules 6--20 mm; petiole 1--8 cm; leaflets 6--10, 10--45 mm. 

Inflorescence: 4--30 cm, flowers generally not to loosely whorled; peduncle 5--13 cm; pedicels 3--10 mm; bract 4--15 mm. 

Flower: 9--16 mm; calyx upper lip 6--8 mm, deeply divided, lower 6--10 mm, entire to 3-toothed; petals violet to lavender, banner back generally hairy, spot generally yellow (to white) turning purple, keel generally unlobed near base, upper margins generally ciliate middle to tip, lower glabrous. 

Fruit:3--5 cm, hairy. 

Note: Variable, +- indistinct from Lupinus excubitus

Ecology: Common. Chaparral, foothill woodland; 

Elevation: < 1500 m. 

Bioregional Distribution: NW, SN, CW, SCo, ChI, WTR, SnGb, PR; 

Distribution Outside California: southern Oregon. 

Flowering Time: Mar--Jun 

Jepson eFlora Author: Teresa Sholars & Rhonda Riggins

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