Gnetum
Quick Summary
Gnetum is a genus of tropical gymnosperm plants belonging to the division Gnetophyta. This genus comprises over 30 species, with most Asian varieties being woody vines, while African species are predominantly trees. One notable species, G. gnemon, is a tree that yields useful fiber and edible fruit.1
The leaves of Gnetum species are broad and feature a net-like veining, superficially resembling those of angiosperms (flowering plants). Additionally, their ovules (potential seeds) are enclosed, and their wood contains open-ended conducting cells called vessels, a characteristic also found in angiosperms. Some botanists have considered gnetophytes, including Gnetum, as potentially close to the ancestral stock of some angiosperms due to these shared features.12
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gnetophyteAnnotated classification…1 family, Gnetaceae; 1 genus, Gnetum, with about 30 species. Order Welwitschiales 2 immense, permanent leaves, which become split and frayed with age; seeds with winglike extensions that may aid in dispersal; restricted to Namib Desert of Africa and vicinity; 1 family, Welwitschiaceae, with 1 member, Welwitschia mirabilis.
Read More…1 family, Gnetaceae; 1 genus, Gnetum, with about 30 species. Order Welwitschiales 2 immense, permanent leaves, which become split and frayed with age; seeds with winglike extensions that may aid in dispersal; restricted to Namib Desert of Africa and vicinity; 1 family, Welwitschiaceae, with 1 member, Welwitschia mirabilis.
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plantAnnotated classification…gymnosperms; sperm nonmotile; extant genera Gnetum, Ephedra, and Welwitschia. Division Pinophyta (conifers) Gymnospermous plants; mostly trees with abundant xylem composed of tracheids only; resin ducts present; leaves
Read More…gymnosperms; sperm nonmotile; extant genera Gnetum, Ephedra, and Welwitschia. Division Pinophyta (conifers) Gymnospermous plants; mostly trees with abundant xylem composed of tracheids only; resin ducts present; leaves
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Gnetaceae…Gnetophyta), composed of one genus, Gnetum, with 30 or more species. Trees predominate among the African species; most of the Asian varieties are woody vines, but among the exceptions is G. gnemon, a tree about 20 metres (65 feet) tall that yields a useful fibre and an edible, plumlike fruit.…
Read More…Gnetophyta), composed of one genus, Gnetum, with 30 or more species. Trees predominate among the African species; most of the Asian varieties are woody vines, but among the exceptions is G. gnemon, a tree about 20 metres (65 feet) tall that yields a useful fibre and an edible, plumlike fruit.…
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plantGymnospermsSpecies of Gnetum occur as woody shrubs, vines, or broad-leaved trees and grow in moist tropical forests of South America, Africa, and Asia. Welwitschia, restricted to extreme deserts (less than 25 mm [1 inch] of rain per year) in a narrow belt about 1,000 km (600 miles)…
Read MoreSpecies of Gnetum occur as woody shrubs, vines, or broad-leaved trees and grow in moist tropical forests of South America, Africa, and Asia. Welwitschia, restricted to extreme deserts (less than 25 mm [1 inch] of rain per year) in a narrow belt about 1,000 km (600 miles)…
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