Baptisia tinctoria (common names include yellow false indigo, wild indigo,[1]wild-indigo[2] and horseflyweed[3]) is a herbaceous perennial plant in the family Fabaceae. It is native to eastern North America.
Baptisia tinctoria is found throughout the eastern United States, west to Minnesota, and south to Florida.[4] As it is rare in some parts of its range, it is protected by some state authorities: in Kentucky it is threatened; in Maine it is considered endangered.[5] It prefers dry meadow and open woodland environments.[6]
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Description
The multiple bushy stems of Baptisia tinctoria reach 2 to 3 feet tall. The leaves are silver-green; each is divided into three leaflets about ½inch long. The flowers are yellow and grow in spikes 1½ to 3inches long.[7]
The leaves are eaten by some lepidopteran caterpillars, for example the Io moth (Automeris io).
On Martha's Vineyard, the species is a tumbleweed: it grows in a globular form, breaks off at the root in the autumn, and tumbles about.[1]
BSBI List 2007(xls). Botanical Society of Britain and Ireland. Archived from the original(xls) on 2015-06-26. Retrieved 2014-10-17.
USDA, NRCS (n.d.). "Baptisia tinctoria". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 9 January 2016.
Canby, William. "Notes on Baptisia." Botanical Gazette 4 (1879): 129-132.
USDA, NRCS. 2007. The PLANTS Database (http://plants.usda.gov, 31 May 2007). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
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