E-Flora BC: Electronic Atlas of the Flora of British Columbia

Lupinus littoralis Douglas
seashore lupine
Fabaceae (Pea family)

Introduction to Vascular Plants

© Virginia Skilton  Email the photographer   (Photo ID #13117)

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Distribution of Lupinus littoralis
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Introduction

Seashore lupine is a Pacific coast species that is found in North America from California north to British Columbia (Riggins and Sholars 1993). In California, seashore lupine is reported from coastal sand (Riggins and Sholars 1993); specifically it is reported from the Northern Coastal Bluff Scrub plant community in California, which is typified by exposure to high winds and salt spray (California State Parks 2008). In BC, it is found in moist sand dunes and beaches in the lowland zone, within the fog zone, and has been found on sand dredgings. Plantings of this species have occurred in Spanish Banks in Vancouver, and the resulting population is well-established.This is a distinctive, often prostrate species with long shaggy hairs particularly in the nodes. Flowers are blue-lilac. Hybrids with Lupinus arboreus have been observed in Fraser delta, with plants varying in morphology between both parents. Hybrids with other lupine species have been reported. The earliest collections of this species in the UBC Herbarium are by Charles E. Beil in 1974, from the Queen Charlotte Islands, and by Adolf and Oluna Ceska in 1974, from Point Holmes (Comox, Vancouver Island) and Sheringham Point (Vancouver Island).

Species Information

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General:
Perennial herb; stems prostrate to decumbent, mat-forming, to 60 cm long, slender, freely branching, short-stiff-hairy and also with long soft spreading hairs.
Leaves:
Alternate, palmately compound with leaf stalks 1-2 times as long as the blades; leaflets 5 to 8, narrowly oblanceolate, blunt to rounded with an abrupt point at the tip, 1.5-3 cm long, glabrous or nearly so above, short-stiff-hairy below.
Flowers:
Inflorescence a stalked, loose, terminal raceme, 5-15 cm long, of whorled pea-like flowers, the racemes numerous; corollas blue to purplish often with some white, 11-13 mm long, the banner nearly circular, with a white central patch and glabrous on the back, shorter than the wings, the keel fringed with fine hairs along the upper edges; calyces 2-lipped, the lips about equal in size, the upper lip 2-toothed, the lower one entire.
Fruits:
Pods, 2-3.5 cm long, 6-8 mm wide, sparsely short-hairy; seeds 5 to 12, greyish but dark-mottled.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist sand beaches and dunes in the lowland zone; infrequent along the coast; S to N CA.

Source: The Illustrated Flora of British Columbia

Additional Notes

Seashore lupine is a pioneer species, and is an early-occurring species in sand dune succession (Kumler 1969). As a pioneer species that does well in sandy conditions, it often appears in sand pre-load sites (sand dredgings) proximal to the coast. Thousands of plants have been observed at one site on Lulu Island in the Fraser Delta. This species is used in sand dune stabilization projects (e.g. Schwendiman 1977).

Ecology

Ecological Framework for Lupinus littoralis

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 11 11 11
Slope Gradient (%) 0 0 0
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 2 2
Modal Nutrient Regime
Class
A
Number of field plots
 species was recorded in:
1
Modal BEC Zone Class
CWH
All BEC Zones (# of stations/zone) species was recorded in: CWH(1)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Species References

California State Parks. 2008. The Point Cabrillo Light Station and Preserve Project Inventory of Features - Resource Summary and Recommendations for Classification and Naming.California State Parks. Available Online.

Kumler, M. L. 1969. Plant succession on the sand dunes of the Oregon coast. Ecology 50 (4): 695-704.

Riggins, Rhonda and Teresa Sholars. 1997. Jepson Manual treatment for Lupinus littoralis Douglas. In: Hickman, James C. The Jepson Manual of the Higher Plants of California. University of California Press, Los Angeles. Available Online.

Schwendiman, J. L. 1977. Coastal sand dune stabilization in the Pacific Northwest. International Journal of Biometeorology. 21 (3): 281-289.

General References