swainsonpea USDA PLANTS Symbol: SPSA3
U.S. Nativity: Exotic
Habit: Shrub or Subshrub Forbs/Herbs
Sphaerophysa salsula (Pallas) DC.

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Taxonomic Rank: Magnoliopsida: Fabales: Fabaceae (Leguminosae)
Synonym(s): Austrian peaweed, red bladder-vetch, alkali swainsonpea

Swainsonpea is a perennial herb that can grow to 5 ft. (1.5 m) in height. Leaves are compound with 15-23 leaflets. Leaflets are ovate, 1/5-3/4 in. (0.5-2 cm) long with short, white hairs on the lower surface. Flowering occurs from May to July, when red-orange flowers develop in the axils of the leaves, near the tip of the stem. Flowers are pea-like, stalked and ½ in. (12-14 mm) long. Fruits are ovoid, grooved on top, inflated at maturity and 0.4-1.4 in. (1.5-3.5 cm) long. Swainsonpea is native to Asia and invades roadsides, right-of-ways, ditches, and other disturbed sites.

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Plant(s);
Utah State University Archive, Utah State University, Bugwood.org
Additional Resolutions & Image Usage

Plant(s); in flower
Utah State University Archive, Utah State University, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Utah State University Archive, Utah State University, Bugwood.org
Additional Resolutions & Image Usage

Seed(s);
Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

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Invasive Listing Sources:
Faith Campbell, 1998
Pacific Northwest Exotic Pest Plant Council, 1998