. Essentials of botany. Botany; Botany. THE PTERIDOPHYTES 289. Fig. 211. A Horsetail (JEquisetum sylvaticum). At the right is a colorless fertile stem, in the middle a green sterile one, and at the left a green fertile Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1908