The Legumes (Family Fabaceae)

The legumes are exceptionally important plants of the grassland woodland ecosystem because they are a very important food source for animals. They produce nectar from the flowers and protein from the seeds (the peas and beans). The legume seeds (the beans and peas) tend to hold their protein content longer than the grasses and other forbs in late winter. In addition, they enrich the soil by their symbiosis with nitrogen fixing bacteria (rhizobia and other bacteria) within the root nodules of the plant. The rhizobia take nitrogen from the air and convert it to nitrogenous compounds, such as ammonia, nitrate and nitrogen dioxide usable by plants, including the host legume, and other organisms.

Legumes represent the third largest terrestrial plant family on Earth, following the orchid and sunflower families.

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