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''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. 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''. ==Species== ''Amorpha'' comprises the following species: * ''Amorpha apiculata'' Wiggins * ''Amorpha californica'' Torr. & A. Gray—California false indigo, mock locust * * var. ''californica'' Torr. & A. Gray * * var. ''napensis'' Jeps. * ''Amorpha canescens'' Pursh—leadplant * ''Amorpha confusa'' (Wilbur) S.C.K. Straub, Sorrie & Weakley * ''Amorpha crenulata'' Rydb.〔Some sources treat ''Amorpha crenulata'' as a synonym (variety) of ''Amorpha herbacea''.〕 (endangered) * ''Amorpha fruticosa'' L.—desert false indigo * ''Amorpha georgiana'' Wilbur—Georgia false indigo * ''Amorpha glabra'' Poir.—mountain false indigo * ''Amorpha herbacea'' Walter—clusterspike false indigo * * var. ''herbacea'' Walter * * var. ''floridana'' (Rydb.) Wilbur * ''Amorpha laevigata'' Torr. & A. Gray—smooth false indigo * ''Amorpha nana'' C. Fraser—dwarf false indigo * ''Amorpha nitens'' F.E. Boynton—shining false indigo * ''Amorpha ouachitensis'' Wilbur—Ouachita false indigo * ''Amorpha paniculata'' Torr. & A. Gray—panicled false indigo * ''Amorpha roemeriana'' Scheele—Roemer's false indigo * ''Amorpha schwerinii'' C.K. Schneid.—Schwerin's false indigo 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Amorpha」の詳細全文を読む スポンサード リンク
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