Crotalaria
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Crotalaria is a genus of herbaceous plants and woody shrubs in the Family Fabaceae (Subfamily Faboideae) commonly know as rattlepods. Some 600 or more species of Crotalaria are described world-wide, mostly from the tropics; at least 500 species are known from Africa. Some species of Crotalaria are grown as ornamentals. The common name rattlepod or rattlebox is derived from the fact that the seeds become loose in the pod as they mature, and rattle when the pod is shaken. The name derives from the Greek, κροταλον, meaning "castanet", and is the same root as the name for the rattlesnakes (Crotalus).
Crotalaria species are used as food plants by the larvae of some Lepidoptera species including Endoclita sericeus and Utetheisa ornatrix.
- Crotalaria spectabilis Roth was introduced to the US from India for green manure. As a legume that supports nitrogen fixing bacteria, it is considered a "soil builder." However, it is also poisonous to cattle (as are many legumes), and has spread rapidly throughout the Southeastern United States where it is now considered an invasive species.
- Crotalaria longirostrata, also known as "longbeak rattlebox" or as "chipilín", is a common leafy vegetable in Oaxaca and Central America. It is considered a weed in the United States.
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