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Lathyrus latifolius  L.
Riley County, Kansas
Height: Trailing or climbing vine to 7 feet
Family: Fabaceae - Bean Family
Flowering Period:   June, July, August
Also Called: Everlasting pea, perennial pea.
Stems: Vine, trailing or climbing via tendrils, 3 to 7 feet long, glabrous, waxy, conspicuously 2-winged; wings 1/5 to 2/5 inch wide.
Leaves: Alternate, pinnate, rachis extending into forked tendril; leaflets 2, lanceolate to elliptic or oblong, 1.6 to 6 inches long, .5 to 1.2 inches wide, glabrous; stipules lanceolate to ovate, 1/2 to 3 inches long, 1/6 to 2/5 inch wide; stalks broadly 2-winged
Inflorescences: Raceme, 5- to 15-flowered, on stalk 4 to 8 inches long.
Flowers: Showy, odorless; stalk 1/2 to 1 inch long; calyx bell-shaped, 1/6 to 1/4 inch long; lobes 5, unequal; corolla papilionaceous, 1/2 to 1 inch long, pinkish-purple, rose or white, sometimes stripped; banner nearly as wide as long; stamens 10, 9 united, 1 free.
Fruits: Pods, linear, 2.5 to 4 inches long, 1/4 to 2/5 inch wide, flattened, glabrous, 10-15 seeded; seeds oblong, 1/5 inch long, dark brown, surface rough.
Habitat: Fence rows, roadsides, waste places; frequently near farms or homes.
Distribution: East 2/3 of Kansas.
Origin: Introduced from Europe as a graden plant and escaped from cultivation.
Toxicity: Seeds are poisonous.
Comments: Very hardy. Will form a dense mat 18 to 30 inches thick when there is nothing for it to climb on. May become weedy or invasive in some habitats.

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