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, (division Gnetophyta), any member of the division Gnetophyta, a small group of gymnospermous vascular plants that are represented by three living genera: Ephedra, Gnetum, and Welwitschia. There are 65 species in the genus Ephedra, 30 …

Jan 31, 2024 · 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 species), and Ephedrales (68 species).

Jan 16, 2016 · There is currently around 70 living species of gnetophytes on Earth and all but one belong to the genera Gnetum and Ephedra. There have been many more species that have gone extinct over the past 100 million years. The gnetophytes sit within the class Pinopsida which includes all gymnosperm plants and belong to the sub-class Gnetidae.

Gnetaceae, a family of tropical gymnosperms in the order Gnetales (division Gnetophyta), composed of one genus, Gnetum, with 30 or more species.

Dec 23, 2015 · The Gnetales are a clade of three genera that is morphologically and genetically so disparate from the remaining seed plant (cycads, Ginkgo, angiosperms, and Coniferales) that its precise placement has remained unclear (Mathews, 2009; reviewed in …

The Gnetales or gnetophytes, also referred to as the Gnetopsida or Gnetophyta, are an interesting group containing three extant families: Ephedraceae (consisting solely of Ephedra, with ca. 40 species), Gnetaceae (consisting solely of Gnetum [including Vinkiella], with ca. 30 species), and the Welwitschiaceae (monospecific, consisting of Welwits...

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.

Jun 11, 2018 · Gnetophyta A remarkable and probably artificial division of gymnosperms that comprises only the Gnetales. There are 3 constituent genera, embracing trees, shrubs, and lianes (Ephedra and Gnetum), and even turnip-like plants (Wel-witschia).

Longitudinal files of cells with pores in end walls (vessels) in xylem (wood); dioecious; strobili (cones) consist of bracts, in the axils of which are the reproductive structures, which have been likened to flowers of angiosperms.