Lupinus concinnus
Lupinus rivularis
bajada lupine
river-bank lupine, stream bank lupine
ascending, tufted, or erect, branched or unbranched.
decumbent, ascending, or erect, branched, dark brown to red, usually hollow.
cauline;
petiole 2–7 cm, spreading-pubescent;
leaflets 5–9, blades 10–30 × 1.5–8 mm, surfaces pubescent.
cauline;
stipules 7–15 mm;
petiole 3–5 cm;
leaflets 5–9, blades 20–40 × 4–9 mm, adaxial surface glabrous.
1–18 cm;
flowers spirally arranged, solitary axillary flowers also sometimes present.
open, 15–50 cm;
flowers ± whorled or not.
erect, 2–8 cm;
bracts persistent, straight, 2.5–4 mm.
3–15 cm;
bracts deciduous, 8–10 mm.
0.7–2 mm.
5–10 mm.
5–12 mm;
calyx 3–5 mm, lobes ± equal, abaxial lobe entire, adaxial lobe deeply cleft;
corolla usually pink to purple, rarely white, banner spot white or yellowish, keel usually glabrous, rarely with few, minute cilia on lower margins.
12–16 mm;
calyx bulge or spur 0–1 mm, abaxial lobe entire or ± 3-toothed, 7–9 mm, adaxial lobe 2-toothed, 7–8 mm;
corolla violet, banner glabrous abaxially, lower keel margins glabrous, adaxial margin ciliate claw to tip.
1–1.5 cm, pubescent.
dark, 3–7 cm, sparsely hairy.
deciduous, petiolate.
deciduous, petiolate.
3–5.
7 or 8, mottled brown with black line, 3–4 mm.
= 48.
Lupinus concinnus
Lupinus rivularis
In Texas, Lupinus concinnus is known from the trans-Pecos region; in California it is more common in the central and southern areas.
Lupinus concinnus is a highly variable, predominantly self-pollinated complex and the named varieties cannot be consistently segregated. Desert plants with linear, coarsely hairy leaflets and few, minute cilia on lower keel margins (at times recognized as var. desertorum) may be confused with L. sparsiflorus.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Lupinus rivularis ranges from Mendocino County in California northward through Oregon and Washington. It has been confirmed in British Columbia (where it is of conservation concern) in the extreme southwestern corner of the province, with a single population on southern Vancouver Island and five populations in the lower Fraser Valley.
Lupinus rivularis is distinguished by its absence of wood, banners that are glabrous abaxially, ciliate keels, glabrous leaf surfaces, and violet flowers. It grades into blue-flowered L. arboreus but blooms earlier (late winter, spring) and is not sweet-smelling. L. L. Phillips (1955) considered L. rivularis as synonymous with L. albicaulis.
Lupinus rivularis is widely planted for erosion control in western Oregon; it is of conservation concern in Canada.
(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
