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''Purshia mexicana'' is a species of perennial flowering small tree in the rose family known by the common name Mexican cliffrose. It is native to western-northern Mexico, the region of the Sierra Madre Occidental cordillera. A different phase which was published as var. ''stansburyana'' (but should have been ''stansburiana'') and which is now treated as ''Purshia stansburyana'' occurs in the southwestern United States, centered on the Colorado Plateau regions of Utah–Colorado, and Arizona–New Mexico; also much of the Great Basin mountains to the west.〔Little, ''Atlas of United States Trees, Volume 3, Minor Western Hardwoods'', Map 55-SW, Map 55-N, ''Cowania mexicana''.〕 In its mostly mountainous, or higher elevation habitat, it grows in woodlands, desert, and plateau habitat. Stenophyllanin A, a tannin, can be found in ''P. mexicana''.〔 Anti-tumor promoting activity of polyphenols from Cowania mexicana and Coleogyne ramosissima. Hideyuki Ito, Masateru Miyake, Eisei Nishitani, Kazuko Mori, Tsutomu Hatano, Takuo Okuda, Takao Konoshima, Midori Takasaki, Mutsuo Kozuka, Teruo Mukainaka, Harukuni Tokuda, Hoyoku Nishino and Takashi Yoshida, Cancer Letters, Volume 143, Issue 1, 23 August 1999, Pages 5-13, 〕 ==Distribution== The range of Mexican Cliffrose is from the western Mexican Plateau in the south, and the southern Sierra Madre Occidental cordillera north to a small region of northwest Sonora;〔Little, Map 55-SW, Map 55-N, ''Cowania mexicana''.〕 it has a continuous range in the cordillera from Chihuahua south through Durango and Zacatecas, all mostly north of the Trans-Mexican Volcanic Belt, though a few scattered locales do occur in the belt.〔Little, Map 55-SW, Map 55-N, ''Cowania mexicana''.〕 In the United States, the range is centered on the Colorado Plateau mostly of central and southern Utah, central and northern Arizona, the entire desert and rock-formation Canyon Lands region; the range continues east into southwest Colorado and neighboring western New Mexico.〔Little, Map 55-SW, Map 55-N, ''Cowania mexicana''.〕 The range continues westwards into the Great Basin desert regions, and southwest into the Mojave Desert including eastern California; scattered locales occur in central New Mexico, and possibly central Baja California.〔Little, Map 55-SW, Map 55-N, ''Cowania mexicana''.〕 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「Purshia mexicana」の詳細全文を読む スポンサード リンク
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