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''Styrax platanifolius'' is a species of flowering plant in the family Styracaceae known by the common name sycamoreleaf snowbell. It is native to northeastern Mexico in the states of Coahuila, Nuevo León, and Tamaulipas〔(''Styrax platanifolius''. ) Flora of North America.〕 and the US state of Texas, especially on the Edwards Plateau.〔(''Styrax platanifolius''. ) The Nature Conservancy.〕 This is a shrub which can grow to 6 meters. The leaves are variable in shape, generally oval with smooth, toothed, or lobed edges, and measuring 4.5 to 12 centimeters in length. The inflorescence is a solitary flower or cluster of up to 7. The bell-shaped white flower is 1 or 2 centimeters long. The fruit is a hairy, spherical capsule about a centimeter long.〔 There are five subspecies of this plant.〔 Some were formerly considered species, but genetic analysis suggests they are more closely related and should be treated as subtaxa of one species.〔USFWS. (''Styrax platanifolius'' ssp. ''texana'' Five-year Review. ) September 2008.〕 The subspecies are mostly characterized on the basis of the amount and arrangement of hairs on the leaves and other parts.〔 Subspecies:〔 *''S. p.'' ssp. ''mollis'' - known from the Sierra Madre Oriental in Nuevo León and Tamaulipas in Mexico. *''S. p.'' ssp. ''platanifolius'' - once the most widespread subspecies and now quite rare. *''S. p.'' ssp. ''stellatus'' (hairy sycamoreleaf snowbell) - formerly ''S. stellatus'', a rare subspecies found along the southern edge of the Edwards Plateau *''S. p.'' ssp. ''texanus'' (Texas snowbell) - formerly ''S. texana'' or ''S. texanus'', rare and federally listed as an endangered species of the United States.〔(''Styrax platanifolius'' ssp. ''texanus''. ) Texas Parks & Wildlife.〕〔(''Styrax texanus''. ) Center for Plant Conservation.〕 There are about 22 populations remaining in the state of Texas.〔 *''S. p.'' ssp. ''youngiae'' (Young's snowbell) - formerly ''S. youngiae'', occurs in Coahuila and possibly in the Davis Mountains of Texas. ==References== 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「Styrax platanifolius」の詳細全文を読む スポンサード リンク
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