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A class of flowerless plants, embracing ferns, horsetails, club mosses, quillworts, and other like plants. See the Note under Cryptogamia. -- Pter"i*do*phyte`, n.

The minute primary growth from the spore of ferns and other Pteridophyta, which bears the true sexual organs; the oöphoric generation of ferns, etc.

tissue, as all flowering plants and the higher cryptogamous plants, or those of the class Pteridophyta. Cf. Cellular plants, Cellular. -- Vascular system (Bot.), the body of associated ducts and woody fiber; the fibrovascular part of plants. -- Vascular tissue (Bot.), vegetable tissue composed partly of ducts, or sap…

sexual and sporophoric, the other sexual and oöphoric. Divided into Vascular Acrogens, or Pteridophyta, having the sporophoric plant conspicuous and consisting partly of vascular tissue, as in Ferns, Lycopods, and Equiseta, and Cellular Acrogens, or Bryophyta, having the sexual plant most conspicuous, but destitute of…