Der Spaltöffnungsapparat im Lichte der Phylogenie Ein Beitrag zur “phylogenetischen Pflanzenhistologie”


THIS work, as its title announces, is an attempt to use the stoma as a mark of relationship, and thus to make it serve as a guide to the phylogeny of plants. The author is filled with a pleasant enthusiasm for his subject, and this he contrives to convey to his readers, who, whether or no they are in complete agreement with his views, will not deny that he has produced an interesting and suggestive book. Personally, we think he has done more, and that his work has decided value. He begins by showing (what has to some extent been shown before) that definite types of stoma run through certain classes or natural orders. He makes it clear that these types remain recognisable even in plants exposed to various environments. The gymnospermous type, for instance, occurs in plants of such diverse habit as Bowenia, Gingko, Dioon, and Gnetum.

Der Spaltöffnungsapparat im Lichte der Phylogenie. Ein Beitrag zur “phylogenetischen Pflanzenhistologie."

By Dr. Otto Porsch. Pp. xiv + 196. (Jena: Gustav Fischer, 1905.) Price 8 marks.

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