. Elementary botany . Fig. 288. Spermatozoids of zamia in pollen tube j>g, pollen grain; «, a, spermatozoids. (After Webber.) Fig. 289. Spermatozoidof zamia showing spiral row of cilia. (After Webber.) Class 1. Class 2. Class 3. Class 4. Gnetales. Cycadales ; family Cycadaceae. Cycas, zamia, etc. Gingkoales ; family Gingkoaceae. Gingko. Coniferae ; family I. Taxaceae. Taxus, the common yew in the eastern United States, and Torreya, in the western United States, are examples, family 2. Pinaceae. Araucaria (redwood of California), firs, spruces, pines, cedars, cypress, etc. Welwitschia mirabi

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. Elementary botany . Fig. 288. Spermatozoids of zamia in pollen tube j>g, pollen grain; «, a, spermatozoids. (After Webber.) Fig. 289. Spermatozoidof zamia showing spiral row of cilia. (After Webber.) Class 1. Class 2. Class 3. Class 4. Gnetales. Cycadales ; family Cycadaceae. Cycas, zamia, etc. Gingkoales ; family Gingkoaceae. Gingko. Coniferae ; family I. Taxaceae. Taxus, the common yew in the eastern United States, and Torreya, in the western United States, are examples, family 2. Pinaceae. Araucaria (redwood of California), firs, spruces, pines, cedars, cypress, etc. Welwitschia mirabilis, deserts of southwest Africa; Ephedra, deserts of the Mediterranean and of West Asia. Gnetum, climbers (Lianas), from tropical Asia and America.

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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany