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Article: senna
- Article from:
- The Columbia Encyclopedia, Sixth Edition
CopyrightThe Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press. (Hide copyright information)
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senna any plant of the genus
Sennia
(formerly placed in
Cassia
), leguminous herbs, shrubs, and trees of the family Leguminosae (
pulse
family), most common in warm regions. Some species are cultivated for ornament, but sennas are best known as medicinal plants. The dried leaves are used as a purgative and are chiefly obtained from
S. acutifolia
(Alexandria senna) and
S. angustifolia
(Indian senna); both trees are cultivated especially in S India. The wild senna (
S. marylandica
), a perennial of the ...
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