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Trillium pusillum
''Trillium pusillum'' is a species of flowering plant in the family Melanthiaceae known by the common names little trillium and dwarf wakerobin.〔〔(Kew World Checklist of Selected Plant Families )〕 It is native to the southeastern and south-central United States from Oklahoma to Maryland.〔〔(Biota of North America 2013 county distribution map )〕
This is a perennial herb with a thin, branching, horizontal rhizome. It produces one or two slender scapes up to tall. They increase in size after flowering. The three bracts are dark green, sometimes with a red tinge when new. The flower has three green to red-tinged sepals up to long and 3 wavy-edged petals which are white and quickly age pink. The 6 stamens are tipped with lavender or yellow anthers each up to a centimeter long. The stigmas have long, narrow, spreading lobes. The pulpy fruit is 1 to 1.5 centimeters long.〔(''Trillium pusillum''. ) Flora of North America.〕
''Trillium pusillum'' can be found in several habitat types, including savannas, swamps, bogs, forests and woods, and fields. It grows on acidic soils.〔 It is commonly pollinated by the western honey bee (''Apis mellifera''), and the seeds are dispersed by ants and harvestmen.〔Andre, C. S., et al. (2005). (Ecology of three populations of the rare woodland perennial, ''Trillium pusillum'' Michaux (Liliaceae) in southwestern Missouri. ) ''Missouriensis'' 26 7-21. (PDF)〕
''Trillium pusillum'' has been divided into several varieties. Some authors accept only two, var. ''pusillum'' and var. ''virginianum''.〔 The var. ''texanum'' is now treated as a separate species, ''Trillium texanum''.〔
==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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