North American Species of Cactus

中文名：
北美仙人掌
作者：
约翰·M·库尔特 John M. Coulter
类型：
生物科学
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北美仙人掌(North American Species of Cactus)简介：
In the fall of 1890 Dr. George Vasey, then Botanist of the Department of Agriculture, arranged with me to prepare a revision of North American Cactaceae. Owing to the peculiar difficulty of preserving material the family was poorly represented, even in our leading herbaria. To secure a large amount of additional material in the way of specimens and field notes the Department authorized me to visit the region of the Mexican boundary during the summer of 1891.

约翰·M·库尔特的作品

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    • 北美仙人掌 North American Species of Cactus

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