Pediomelum argophyllum aka Silverleaf Indian Breadroot

Pediomelum argophyllum belongs to the pea family, Fabaceae. It is a perennial, which means it lives for years. Common names include silverleaf scurf pea and silverleaf breadroot. Its older name is Psoralea argophylla. Both names refer to the same species. It grows in central North America, including southern Canada. Its range spans much of the central United States. Wild plants grow on dry prairies and open plains. Records place it up to 4,920 feet [1,500 metres] above sea level.

This herb grows from a swollen rootstock, with stems that stand upright. The stems branch out widely and often take a zigzag course. Plants reach about 1–2 feet [0.3–0.6 metres] in height. The account gives no mature spread or details about leaves. It gives no flower colour or facts about the fruit. Each flower has both male and female organs. Insects carry pollen to pollinate the flowers. Root nodules hold bacteria that take nitrogen from the air. The plant uses this nitrogen. Plants nearby may benefit too.

Grow this species in full sun and soil that drains well. Plants For A Future says it cannot grow in shade. That source lists sand, loam, and clay as suitable soils. The soil can be slightly acid, neutral, or slightly alkaline. It may be dry or moist but must drain well. The source lists USDA hardiness zones 4–8. Parts of its native range have hot summers and cold winters.

Choose a lasting spot before you set out young plants. Moving plants once they have settled in risks root damage. The source warns that moving them can kill them. Division also has a very low chance of success. To grow from seed, soak seeds in warm water for 24 hours. Sow each in its own pot under glass in early to mid-spring. Put seedlings in their final spots while still small. In its native range, this plant helps hold soil in place. People also use its tough green stems to make baskets.

The root is the only part listed as edible. People eat it raw or cooked, or dry it for flour. They can add this flour to soups or cereal-based breads. Past uses as medicine include remedies for fever, wounds, and constipation. These records show past use, not proof of safe treatment. The evidence gives no toxicity rating for this species alone. It lists no specific pest or disease problems.