Gymnospermae


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Related to Gymnospermae: Angiospermae
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Noun1.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)
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 Ginkgophytina, class Ginkgopsida, Ginkgophytina, Ginkgopsida, subdivision Ginkgophyta, subdivision Ginkgophytina - 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
gymnospermous tree - any tree of the division Gymnospermophyta
References in periodicals archive ?
The tree species could not be identified with full certainty, but it clearly belongs to the class of Gymnosperms (Gymnospermae).
Flora Argentina 2 (Licofitas, Helechos y Gymnospermae): 86-104.
Somatic embryogenesis from leaves of a mature plant of Ceratozamia euryphylhdia (Cycadales, Gymnospermae), an endangered species.
Coniferous.--All woods derived from trees classified botanically as Gymnospermae, e.g., Abies spp., Araucaria spp., Cedrus spp., Chamaecyparis spp., Cupressus spp., Larix spp., Picea spp., Pinus spp., Thuja spp., Tsuga spp., etc.
Plantas de la Amazonia Peruana Clave para Identificar las Familias de Gymnospermae y Angiospermae.
Sixteen tree species were angiospermae (Olea europaea, Acer negundo, Magnolia soulangeana, Cercis siliquastrum, Ficus carica, Salix viminalis, Fraxinus excelsior, Prunus subsp., Prunus ceracifera 'Atropurpureum', Eribotrya japonica, Laurocerasus officinalis, Juglans nigra, Quercus pontica, Alnus glutinosa, Trachycarpus fortunei, Populus tremula), and 9 were Gymnospermae (Sequoia sempervirens, Picea orientalis, Cryptomeria japonica, Pinus pinea, Cedrus deodora, Cupressus sempervirens Pyramidalis, Chamaecyparis pisifera, Cupressus macrocarpa 'Goldcrest', Cupressoparis leylandii) subspecies (Figure / Sekil 14).
Presl (Fossil Gymnospermae, Coniferales, Araucariaceae) against Araucarites Endl.
HPLC separation of O-acylated flavonoids and biflavones from some species of gymnospermae. Chromatographia 60, 9-15.
Part I: Eumycetes, Pteridophyta, Gymnospermae, Angiospermae (Monocotyledones only).
Further comprehensive studies of ferns (Sessa et al., 2014) and basal seed plants such as conifers (Gymnospermae), e.g., the Norway spruce (Nystedt et al., 2013), need to be conducted to determine whether the loss of the HIP subfamily occurred prior to the evolution of ferns, gymnosperms, or angiosperms.
Plants of the Peruvian Amazon: Identity key to the families of Gymnospermae and Angiospermae.