Definition of Gymnospermae
1. Noun. Plants having naked seeds not enclosed in an ovary; in some systems considered a class (Gymnospermae) and in others a division (Gymnospermophyta); comprises three subdivisions (or classes): Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida) and Coniferophytina (class Coniferopsida); in some classifications the Coniferophytina are divided into three groups: Pinophytina (class Pinopsida) and Ginkgophytina (class Ginkgopsida) and Taxophytina (class Taxopsida).
Generic synonyms: Class
Group relationships: Division Spermatophyta, Spermatophyta
Member holonyms: Gymnosperm Family, Gymnosperm Genus, Gymnosperm, Class Gnetopsida, Gnetophyta, Gnetophytina, Gnetopsida, Subdivision Gnetophytina, Class Cycadopsida, Cycadophyta, Cycadophytina, Cycadopsida, Subdivision Cycadophyta, Subdivision Cycadophytina, Class Pteridospermopsida, Pteridospermopsida, Class Coniferopsida, Coniferophyta, Coniferophytina, Coniferopsida, Subdivision Coniferophytina, Class Ginkgophytina, Class Ginkgopsida, Ginkgophytina, Ginkgopsida, Subdivision Ginkgophyta, Subdivision Ginkgophytina, Gymnospermous Tree
Medical Definition of Gymnospermae
1. An important division of the plant kingdom, being woody plants with alternation of generations, having the gametophyte retained on the sporophyte and seeds produced on the surface of the sporophylls and not enclosed in an ovary. (09 Oct 1997)
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Lexicographical Neighbors of Gymnospermae
Literary usage of Gymnospermae
Below you will find example usage of this term as found in modern and/or classical literature:
1. An Illustrated Flora of the Northern United States: Canada and the British by Nathaniel Lord Britton, Addison Brown (1896)
"gymnospermae. •Ovules and seeds contained in a closed cavity (ovary). Class 2. ANGIOSPERMAE. Class i. gymnospermae. ..."
2. Organography of Plants, Especially of the Archegoniata and Spermaphyta by Karl Goebel, Isaac Bayley Balfour (1905)
"The structure of the microsporangia of the gymnospermae links on closely to that of the sporangia of the Pteridophyta, in that the outermost layer of their ..."
3. An Introduction to the Study of Fossils (plants and Animals) by Hervey Woodburn Shimer (1914)
"... A. gymnospermae B. Angiospermae 75 SUB-DIVISION A, GYMNOSPERM.-E In these plants the seeds are unprotected by any covering. This character is indicated ..."
4. Flora of the Rocky Mountains and Adjacent Plains, Colorado, Utah, Wyoming by Per Axel Rydberg (1917)
"gymnospermae. NAKED-SEEDED PLANTS. Ovules naked, inserted on the upper side of an open, mostly flat, more or less developed scale, not enclosed in an ovary. ..."
5. A Text-book of Botany by Eduard Strasburger (1898)
"CLASS I gymnospermae The flowers of the Gymnosperms are always unisexual and naked, or in rare cases (Gnetaceae) provided with a small, ..."