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Tetraneuris herbacea
''Tetraneuris herbacea''〔(''T. herbacea''. ) GRIN Species Profile.〕〔(''T. herbacea''. ) ITIS.〕〔(''T. herbacea''. ) Center for Plant Conservation.〕〔(''T. herbacea''. ) The Nature Conservancy.〕〔(''T. herbacea''. ) Flora of North America.〕 is a rare species of flowering plant in the aster family known by the common names lakeside daisy, eastern four-nerved daisy, fournerved starflower, and Manitoulin gold. It is native to the Great Lakes region in North America, where it is present in Ontario, Ohio, Michigan, and Illinois.〔(Biota of North America Program 2014 county distribution map )〕 It is threatened by habitat destruction and degradation by several forces, including limestone quarrying, recreational activity, fire suppression, and construction.〔 It is a federally listed threatened species of the United States and of Canada.〔
== Description ==
''Tetraneuris herbacea'' is a perennial herb growing from a branching caudex with one or more erect stems measuring 6 to about 35 centimeters (2.4-14.0 inches) tall. The leaves are located around the base of the plant and have rubbery, glandular blades. The inflorescence is a single flower head borne on a hairy peduncle. The head contains 50-250 yellow disc florets surrounded by 7-27 (occasionally 0) yellow ray florets each ray measuring 1 or 2 centimeters (0.4-0.8) in length. The fruit is an achene tipped with a pappus of scales.〔
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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