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''Bidens micrantha'' is a species of flowering plant in the aster family known by the common name grassland beggarticks. It is endemic to the Hawaiian Islands, where it and other ''Bidens'' species are known as ''kōokoolau''.〔(【引用サイトリンク】title=''Bidens micrantha'' )〕 It occurs in many types of habitat on Lānai, Maui, and Hawaii, including rocky cliffs, dry forests, mesic forests, wet forests, and high shrublands.〔 ;Subspecies〔〔(【引用サイトリンク】title=Flora of the Hawaiian Islands )〕 *''B. m.'' ssp. ''micrantha'' (Maui) *''B. m.'' ssp. ''ctenophylla'' (Sherff) Ganders & Nagata (leeward Hualālai on Hawaii) *''B. m.'' ssp. ''kalealaha'' Ganders & Nagata (Lānai and West Maui) While ''B. m.'' ssp. ''micrantha'' is considered secure, ''B. m.'' ssp. ''ctenophylla'' is uncommon and vulnerable and ''B. m.'' ssp. ''kalealaha'' is rare and federally listed as an endangered species.〔〔(【引用サイトリンク】title=ko`oko`olau (Bidens micrantha kalealaha) )〕 This is a shrub forming clumps of herbage up to several feet tall. It bears plentiful flower heads with yellow ray florets. It is grown as an ornamental plant and groundcover in Hawaii.〔 This species was used to make leis and was brewed into tea.〔 ==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「Bidens micrantha」の詳細全文を読む スポンサード リンク
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