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Mimosa
From Wikipedia, the free encyclopedia
- For other uses, see Mimosa (disambiguation).
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 Mimosa pudica foliage and flower-head
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and about 400 other species. |
Mimosa is a genus of about 400 species of herbs and shrubs, in the subfamily Mimosoideae of the legume family Fabaceae, with evenly bipinnate leaves. The best-known species is Mimosa pudica, which is also known as the sensitive plant or sleeping grass because of the way it folds its leaves down when touched or exposed to heat; many others also fold their leaves in the evening. It is native to southern Mexico and Central America but is widely cultivated elsewhere for its curiosity value, both as an indoor plant in temperate areas, and outdoors in the tropics. Outdoor cultivation has led to weedy invasion in some areas, notably Hawaii.
Members of this genus are among the few plants capable of rapid movement; examples outside of Mimosa include the Telegraph plant, and the Venus Flytrap.
The genus Mimosa has had a tortuous history, having gone through periods of splitting and lumping, ultimately accumulating over 3,000 names, many of which have either been synonymized under other species or transferred to other genera. In part due to these changing circumscriptions, the name "Mimosa" has also been applied to several other related species with similar pinnate or bipinnate leaves but now classified in other genera, most commonly to Albizia julibrissin (Silk Tree) and Acacia dealbata (Silver Wattle).
In Russia, Italy and other countries it is customary to present women with yellow mimosas (among other flowers) on International Women's Day (March 8). This flower is from the Acacia dealbata (Silver Wattle), which is not a true Mimosa.
- Barneby, R.C. 1992. Sensitivae Censitae: A description of the genus Mimosa Linnaeus (Mimosaceae) in the New World. Memoirs of the New York Botanical Garden, vol. 65.