The
gymnosperms are a group of seed-producing plants that includes conifer s, cycad s, Ginkgo , and Gnetales . The term "
gymnosperm"
Kaynak: GymnospermAngiosperms are seed-producing plants like the
gymnosperm s and can be distinguished from the
gymnosperms by a series of synapomorphies
Kaynak: Flowering plantThey differ from seed plant s (
gymnosperm s and angiosperm s) in their mode of reproduction—lacking flowers and seed s. Like all other
Kaynak: FernGnetum is a genus of about 30-35 species of
gymnosperm s, the sole genus in the family Gnetaceae and order Gnetales. They are tropical
Kaynak: GnetumThe plant division Gnetophyta or gnetophytes consists of three genera of woody plant s grouped in the
gymnosperm s. The living
Kaynak: GnetophytaWelwitschia is a monotypic
gymnosperm genus , comprising solely the very distinct Welwitschia mirabilis. The plant is commonly known
Kaynak: WelwitschiaEphedra is a genus of
gymnosperm shrub s, the only genus in its family, Ephedraceae, and order, Ephedrales. The c. 50 species of Ephedra
Kaynak: Ephedra (genus)of complexity , from the earliest algal mat s, through bryophyte s, lycopod s, fern s to the complex
gymnosperm s and angiosperm s of today.
Kaynak: PlantSoftwood is wood from
gymnosperm trees such as conifer s. Evergreen trees are often called softwoods with the notable exceptions being
Kaynak: SoftwoodThe Ginkgoaceae is a family of
gymnosperm s which appeared during the Mesozoic Era, of which the only extant representative is Ginkgo
Kaynak: GinkgoaceaeCordaites is an important genus of extinct
gymnosperm s which grew on wet ground similar to the Everglades in Florida . Brackish water
Kaynak: CordaitesPhyllocladus aspleniifolius (Celery-top pine) is an endemic
gymnosperm of Tasmania , Australia . It is found in rainforest as a dominant
Kaynak: Phyllocladus aspleniifoliusParasitaxus usta is unique as the only known parasitic
gymnosperm . It occurs on New Caledonia , where it is parasitic on another member
Kaynak: PodocarpaceaeJohn Theodore Buchholz (1888-1951) was an American botanist , specialising in
gymnosperm s. Selected bibliography. Polyembryony among
Kaynak: John Theodore BuchholzIn
gymnosperm s such as conifers and similar plants, the ovules are typically borne on the surface of an ovuliferous (ovule-bearing) scale
Kaynak: Ovule