Gymnospermae — 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… … Useful english dictionary
class Coniferopsida — noun cone bearing gymnosperms dating from the Carboniferous period; most are substantial trees; includes the classes Pinopsida (subdivision Pinophytina) and Ginkgopsida (subdivision Ginkgophytina) and Taxopsida (subdivision Taxophytina) which in… … Useful english dictionary
class Ginkgophytina — noun ginkgos: in some systems classified as a class and in others as a subdivision; used in some classifications for one of five subdivisions of Gymnospermophyta • Syn: ↑Ginkgopsida, ↑class Ginkgopsida, ↑Ginkgophytina, ↑subdivision Ginkgophytina … Useful english dictionary
class Ginkgopsida — noun ginkgos: in some systems classified as a class and in others as a subdivision; used in some classifications for one of five subdivisions of Gymnospermophyta • Syn: ↑Ginkgopsida, ↑Ginkgophytina, ↑class Ginkgophytina, ↑subdivision… … Useful english dictionary
class Cycadopsida — noun palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta) • Syn:… … Useful english dictionary
class Gnetopsida — noun gymnospermous flowering plants; supposed link between conifers and angiosperms; in some systems classified as a class (Gnetopsida) and in others as a subdivision (Gnetophytina or Gnetophyta) • Syn: ↑Gnetopsida, ↑Gnetophytina, ↑subdivision… … Useful english dictionary
class Pteridospermopsida — noun extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies • Syn: ↑Pteridospermopsida • Hypernyms: ↑class • Member Holonyms: ↑Gymnospermae, ↑class Gymnospermae, ↑Gymnospermophyta, ↑ … Useful english dictionary
division Gymnospermophyta — 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… … Useful english dictionary
Gymnospermophyta — 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… … Useful english dictionary
Spermatophyta — noun seed plants; comprises the Angiospermae (or Magnoliophyta) and Gymnospermae (or Gymnospermophyta); in some classification systems Spermatophyta is coordinate with Pteridophyta (spore producing plants having vascular tissue and roots) and… … Useful english dictionary
