class gymnospermae

Noun

class Gymnospermae - 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)

division Gymnospermophyta, Gymnospermae, Gymnospermophyta

class - (biology) a taxonomic group containing one or more orders

division Spermatophyta, Spermatophyta - 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 Bryophyta (spore producing plants lacking vascular tissue and roots)

gymnosperm family - a family of gymnosperms

gymnosperm genus - a genus of gymnosperms

gymnosperm - plants of the class Gymnospermae having seeds not enclosed in an ovary

class Gnetopsida, Gnetophyta, Gnetophytina, Gnetopsida, subdivision Gnetophytina - 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)

class Cycadopsida, Cycadophyta, Cycadophytina, Cycadopsida, subdivision Cycadophyta, subdivision Cycadophytina - 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)

class Pteridospermopsida, Pteridospermopsida - extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies

class Coniferopsida, Coniferophyta, Coniferophytina, Coniferopsida, subdivision Coniferophytina - 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 turn include the surviving orders Coniferales and Taxales (yews) and sometimes Ginkgoales as well as extinct orders such as Cordaitales (of the Carboniferous and Permian)

class Ginkgopsida, Ginkgophyta, Ginkgophytina, Ginkgopsida, subdivision Ginkgophytina - ginkgos: in some systems classified as a class (Ginkgopsida) and in others as a subdivision (Ginkgophytina or Ginkgophyta); used in some classifications for one of five subdivisions of Gymnospermophyta

gymnospermous tree - any tree of the division Gymnospermophyta

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