UW Burke Herbarium species comparison

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Lupinus arbustus

Lupinus arboreus
Lupinus arbustus

longspur lupine, spurred lupine

tree lupine, yellow bush lupine
Habit Diffusely branched, shrubby perennial 1-2 m. tall, from deep, heavy roots, silky to pubescent.
Leaves

Leaves numerous;

leaflets 5-11, oblanceolate, 3-6 cm. long, puberulent to silky.
Flowers

Inflorescence of numerous, loose racemes, 1-2.5 dm. long;

flowers 14-18 mm. long, yellow, the banner often somewhat purplish; pedicles 4-9 mm. long;

calyx puberulent, two-lipped;

banner well reflexed, glabrous;

keel sickle-shaped, with marginal hairs.
Fruits

Pods 4-6 cm. long and 1 cm. broad, hairy.

Lupinus arbustus

Lupinus arboreus
Flowering time May-July May-September
Habitat Sagebrush deserts and ponderosa pine forest openings. Sandy soil at low elevations, often where disturbed.
Distribution
Occurring east of the Cascades crest in Washington; British Columbia to California, east to Montana and Utah.
[WildflowerSearch map]
[BONAP county map]
Occurring chiefly west of the Cascades crest in Washington in the lowlands and along the Pacific coast; British Columbia to California.
[WildflowerSearch map]
[BONAP county map]
Origin Native Introduced from California, where native
Conservation status Not of concern Not of concern
Sibling taxa
L. albicaulis, L. arboreus, L. argenteus, L. bicolor, L. latifolius, L. lepidus, L. leucophyllus, L. littoralis, L. microcarpus, L. nootkatensis, L. oreganus, L. pachylobus, L. polyphyllus, L. pusillus, L. rivularis, L. sabinianus, L. saxosus, L. sericeus, L. sulphureus
L. albicaulis, L. arbustus, L. argenteus, L. bicolor, L. latifolius, L. lepidus, L. leucophyllus, L. littoralis, L. microcarpus, L. nootkatensis, L. oreganus, L. pachylobus, L. polyphyllus, L. pusillus, L. rivularis, L. sabinianus, L. saxosus, L. sericeus, L. sulphureus
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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