Gnetophyta - Wikipedia
Gnetophyta (/ nɛˈtɒfɪtə, ˈnɛtoʊfaɪtə /) is a division of plants (alternatively considered the subclass Gnetidae or order Gnetales), grouped within the gymnosperms (which also includes conifers, cycads, and ginkgos), that consists of some 70 species across the three relict genera: Gnetum (family Gnetaceae), Welwitschia (family Welwitschiaceae), a...
Gnetophyte | Definition, Plants, Characteristics ...
Gnetophyte, any member of the division Gnetophyta, a small group of gymnospermous vascular plants that are represented by three living genera: Ephedra, Gnetum, and Welwitschia. The three genera exhibit great diversity in the immense variety of form and size among the various species.
Gnetophyta | Characters, Taxonomy, Morphology and Anatomy
2024年7月9日 · Seventy (70) species from the genus Gnetum consist of a few trees and shrubs accompanied by several woody vine species. They can be difficult to identify because the distinguishable characteristics are often hidden up in the canopy and only the woody stem of the vine can be seen from ground level.
Gnetophyta - Basic Biology
2016年1月16日 · Gnetophyta. The gnetophytes are a strange group of plants. They include approximately 70 species of gymnosperms that each exhibit a number of flowering characteristics which have led people to believe they may be the predecessors to …
8.5: Gnetophytes - Biology LibreTexts
2024年1月31日 · Gnetophytes (Phylum Gnetophyta) Gnetales are the least familiar group of gymnosperms. There are 112 species in the world (Christenhusz and Byng, 2016), being divided into three main subgroups: Welwitschia (1 species), Gnetales (43 …
22.5: Gnetophytes and Conifers - Biology LibreTexts
Female plants have covered ovules, while male plants have pollen cones. Observe the gnetophyte specimens available in lab. Make notes and drawings of features that would help you recognize this group in the space below: Monoecious. Plants produce both male and female strobili on the same plant.
7.3: Gnetophytes - Biology LibreTexts
Gnetophytes represent an anatomically and genetically difficult group to classify. They have several traits in common with angiosperms, such as vessel elements in the xylem, double fertilization, and a covering over their seeds. Even their …
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