The pea family (Leguminosae or Fabaceae) is known for fixing nitrogen. Crops are rotated with legumes to restore nitrogen to the soil. Some members of the pea family are toxic while others are edible. Edible plants include peanuts (Arachis hypogea), garbanzo beans (Cicer arietinim), soybeans (Glycine max), lentils (Lens culinaris), beans (Phaseolus), peas (Pisum sativum), licorice (Glycyrrhiza) and jicama. Animal foods include alfalfa, sweet clover, clover, vetch and lupines. Some types of wood come from the pea family such as Rosewood (Dalbergia), Mesquite (Prospis) and Robinia (Locust).
Clovers are members of the pea family. Species include trifolium, dalea and melilotus. Flower colors include white, pink, yellow and purple. Plant types include herbs and forbs. Some forms of clover are weeds. Other forms of clover, like red clover, are used for medicinal purposes to relieve inflammation.
Milkvetch, or Astragalus, plants include forbs and herbs. The flowers are yellow, purple or white. Milkvetch plants are not considered weeds. Milkvetch is used in Chinese medicine. The roots are used in soups and teas and combined with other herbs like ginseng and licorice.
Lupines are herbs or shrubs. Lupines include species with yellow, pink, blue or white flowers. Plants with blue flowers are known as bluebonnets. Species include corniculatus or caudatus. Some species are poisonous to livestock. Lupine usually grows at the edges of and in the woods.
Lathyrus or Peavines are the only members of the pea family that are vines. These plants have common names such as sweet pea, everlasting pea, few-flowered peavine and bushy peavine. Sweet peas are frequently grown by gardeners and produce peas in pods. Flowers are pink, purple or white. The seeds of this plant are toxic in large quantities.
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