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Gnetum |
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Gnetum
the only genus of the Gnetaceae family. There are about 40 species, distributed in humid tropical forests, particularly in South and Southeast Asia but also in South America and western tropical Africa. They are chiefly lianas, but some, such as G. gnemon, are small trees or bushes. The leaves are opposite, broad, integral, leathery, penninervate, with typical network veining. The plants are diclinous. Both the micro- and megastrobiles are gathered into whorls. The female gametophyte lacks archegonia, and egg cells are formed from free nuclei in the upper part of the gametophyte. When the seed ripens, the internal cover of the megastrobile forms a hard, rocklike layer, and the brightly colored surface becomes fleshy. In tropical Asia several Gnetum species, for example, G.gnemon, are cultivated for their edible seeds. Young leaves and the strobiles are also used as food. G. ula provides edible oil. REFERENCETakhtadzhian, A. L. Vysshie rasteniia, vol. 1. Moscow-Leningrad, 1956.A. L. TAKHTADZHIAN Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | The last two features represent a division of labor between two conductive cells possible in vascular plants with vascular cambia, and aside from dicotyledons, only Ephedra and Gnetum possess this feature. 2003) a set of gymnosperms (specifically Gnetum and Ephedra (Gnetales)) was designated as outgroup. The internal transcribed spacer of nuclear ribosomal DNA in the gymnosperm Gnetum. |
Gnetum |
GNESA GNESD Gnesen Gnesin's Music Pedagogic Institute Gnesin, Mikhail Gnesin, Mikhail Fabianovich Gnesina, Elena Gnesina, Elena Fabianovna GNESO GNEST GNET GNet Management System Gnetaceae Gnetaceae Gnetae Gnetae Gnetales Gnetales Gnetatae Gneticae Gnetophyta Gnetophyta Gnetophyte Gnetophyte Gnetophytes Gnetophytes Gnetophytina Gnetopsida Gnetopsida GNETS Gnetum Gnetum gnemonGnew Gnezdovo Gnezdovo burial mounds Gnezdovo inscription Gnezdychev GNF GNF GNFA GNFAB GNFB GNFC GNFCC GNFF GNFG GNFHC GNFI GNFL GNFN GNFP GNFPP GNFPWLBN GNFS GNG GNGB | |||||||
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