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Crataegus rivularis : ウィキペディア英語版 | Crataegus rivularis
''Crataegus rivularis'' is a species of hawthorn known by the common name river hawthorn. It is native to the intermontane region of the northwestern U.S., situated between the coastal ranges and the Rocky Mountains.〔 ''C. rivularis'' is one of the black-fruited hawthorn species. It is closely related to ''C. erythropoda'', and less closely related to ''C. saligna''.〔〔Phipps, J.B. (1999). The relationships of the American black-fruited hawthorns ''Crataegus erythropoda'', ''C. rivularis'', ''C. saligna'' and ''C. brachyacantha'' to ''C.'' ser. ''Douglasianae'' (Rosaceae). ''Sida Contributions to Botany''. 18(3): 647–660.〕 ==Images==
Image:Crataegus_rivularis_young_fruit.jpg|Young fruit Image:Crataegus_rivularis_young_bark.jpg|Young bark.
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「Crataegus rivularis」の詳細全文を読む
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