Lupinus arboreus
Lupinus padrecrowleyi
coastal bush lupine, tree lupine, yellow bush lupine
Father Crowley's lupine
ascending or erect, branched, woody.
erect, clustered, branched or unbranched, long-villous.
cauline;
stipules 8–12 mm;
petiole 2–3(–6) cm;
leaflets 5–12, blades 20–60 × 3–10 mm, adaxial surface glabrous.
basal and cauline;
stipules 5–11 mm;
petiole 2–3 cm;
leaflets 6–9, blades 25–75 × 4–6 mm, adaxial surface villous, hairs silvery.
10–30 cm;
flowers whorled or not.
7–21 cm;
flowers ± whorled.
4–10 cm;
bracts deciduous, 8–10 mm.
2–5.5 cm;
bracts deciduous or persistent, 4–9 mm.
4–10 mm.
2–3.5 mm.
14–18 mm;
calyx bulge or spur 0–1 mm, abaxial lobe entire, 5–7 mm, adaxial lobe 2-toothed, 5–9 mm;
corolla usually yellow, rarely lilac to purple, banner patch darker or not or white, banner glabrous abaxially, lower keel margins glabrous, adaxial margin ciliate from claw to tip.
10–14 mm;
calyx bulge or spur 0–1 mm, abaxial lobe 3-toothed, 5.5–8 mm, adaxial lobe, 2-toothed, 5–7 mm;
corolla cream to pale yellow, banner usually hairy abaxially, keel glabrous.
4–7 cm, hairy.
2–3 cm, silky.
deciduous, petiolate.
deciduous, petiolate.
8–12, black to tan, often striped lighter, 4–5 mm.
2 or 3, white, mottled black, 4–5 mm.
= 48.
Lupinus arboreus
Lupinus padrecrowleyi
Lupinus arboreus is known from the central California coast southward to northern Baja California; it was introduced as a sand binder and has become naturalized in northern California, Oregon, Washington, and southern British Columbia.
Lupinus arboreus grades into L. rivularis in the North Coast of California. Plants with yellow petals and sweet-smelling flowers are widely cultivated as a sand binder. Hairier plants from the western San Francisco Bay area with yellow banners and blue wings have been called var. eximius; plants with glabrous leaflets and purple petals have been called L. propinquus. Lupinus arboreus hybridizes with L. littoralis and probably other species. Seeds of L. arboreus species are toxic.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Lupinus padrecrowleyi is known from the southern Sierra Nevada, mostly on the east slope, in Inyo, Mono, and Tulare counties.
Lupinus padrecrowleyi can easily be distinguished from other Lupinus species by its usually white-woolly leaves, both clustered at base and along the stem, banners that are hairy abaxially, glabrous keels, and cream to yellow flowers.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria, Turner Photog. 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
- Local floras: CA
- Local Web sites: CalFlora, CalPhotos
- WildflowerSearch
- iNaturalist (observations)
- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
