North American Species of Cactus(北美仙人掌)

North American Species of Cactus(北美仙人掌)

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by John M. Coulter. U.S. Department of AgricultureDivision of Botany CONTRIBUTIONS FROM THE U. S. NATIONAL HERBARIUM Vol. III--No. 2 Issued June 10, 1894 Preliminary Revision of the North American Spe...