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Polygonella macrophylla
''Polygonella macrophylla'' is a species of flowering plant in the knotweed family known by the common name largeleaf jointweed. It is native to a small area around the border between Alabama and Florida in the United States.〔(''Polygonella macrophylla''. ) Center for Plant Conservation.〕〔(''Polygonella macrophylla''. ) The Nature Conservancy.〕
This plant is a perennial herb or subshrub with stiff, erect stems coming from a woody base and taproot. It may exceed one meter in height. The leathery leaves are alternately arranged. The largest near the stem bases are up to 6.8 centimeters long. They are mostly oval with smooth edges and rounded tips. The inflorescence is made up of a number of racemes of flowers. There is a white- or pinkish-flowered form and a red-flowered form.〔〔(''Polygonella macrophylla''. ) Flora of North America.〕〔Lewis, P. O. (1991). (Allozyme variation in the rare Gulf Coast endemic ''Polygonella macrophylla'' Small (Polygonaceae). ) ''Plant Species Biology'' 6(1) 1-10.〕
This species occurs in the Florida scrub of the Florida Panhandle and a part of southern Alabama. It grows in open scrub and coastal dunes. Rare in general, it can be common in its range.〔〔
The main threat to the species is the loss of its scrub habitat to development and silviculture.〔〔
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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