Ecology

Associations

In Great Britain and/or Ireland:
Foodplant / feeds on
Phoma coelomycetous anamorph of Phoma amorpha feeds on Amorpha

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Amorpha

For the moth, see Amorpha (moth).

Amorpha is a genus of plants in the pea family, Fabaceae. All the species are native to North America, from southern Canada, most of the United States, and northern Mexico. They are commonly known as false indigo. The name Amorpha means "deformed" or "without form" in Greek and was given because flowers of this genus only have one petal, unlike the usual "pea-shaped" flowers of the Faboideae subfamily. Amorpha is missing the wing and keel petals.[2]

The desert false indigo or indigo bush (Amorpha fruticosa), is a shrub that grows from 3 m to 5 m tall. The species is considered a rare species in the U.S. state of West Virginia and in the Canadian provinces of Manitoba and Ontario, but is considered an invasive plant in some areas of the northeastern and northwestern United States and in southeastern Canada, beyond its native range, and has also been introduced into Europe.

The lead plant (Amorpha canescens), a bushy shrub, is an important North American prairie legume. Lead plant is often associated with little bluestem (Schizachyrium scoparium), a common prairie grass. Native Americans used the dried leaves of lead plant for pipe smoking and tea.

Amorpha species are used as food plants by the larvae of some Lepidoptera species including Schinia lucens, which feeds exclusively on the genus.

Amorphol, a rotenoid bioside, can be isolated from plants of the genus Amorpha.[3]

Species[edit]

Amorpha comprises the following species:[4][5][6]

Species names with uncertain taxonomic status[edit]

The status of the following species is unresolved:[6]

Hybrids[edit]

The following hybrid has been described:[6]

References[edit]

  1. ^ Cardoso D, Pennington RT, de Queiroz LP, Boatwright JS, Van Wyk B-E, Wojciechowski MF, Lavin M. (2013). "Reconstructing the deep-branching relationships of the papilionoid legumes". S Afr J Bot 89: 58–75. doi:10.1016/j.sajb.2013.05.001. 
  2. ^ Gledhill D. (2008). The Names of Plants. Cambridge University Press. ISBN 0-521-86645-6. Retrieved 24 December 2008. 
  3. ^ Kasymov AU, Kondratenko ES, Abubakirov NK. (1974). "Structure of amorphol—A rotenoid bioside from plants of the genus Amorpha". Chem Nat Compd 10 (4): 470–473. doi:10.1007/BF00563810. 
  4. ^ "ILDIS LegumeWeb entry for Amorpha". International Legume Database & Information Service. Cardiff School of Computer Science & Informatics. Last edited on 1 November 2005 (rebuilt on 24 April 2013). Retrieved 7 July 2014. 
  5. ^ USDA, ARS, National Genetic Resources Program. "GRIN species records of Amorpha". Germplasm Resources Information Network—(GRIN) [Online Database]. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved 7 July 2014. 
  6. ^ a b c "The Plant List entry for Amorpha". The Plant List. Royal Botanic Gardens, Kew and the Missouri Botanical Garden. 2013. Retrieved 7 July 2014. 
  7. ^ Some sources treat Amorpha crenulata as a synonym (variety) of Amorpha herbacea.
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