Gnetophyten - Gnetales, Welwitschie, Meertraubel, Gnetum, Schweizer Meertraubel, Nebroden-Meertraubel (English, German, Paperback)

Aus Wikipedia. Nicht dargestellt. Auszug: Gnetum is a genus of about 30-35 species of gymnosperms, the sole genus in the family Gnetaceae and order Gnetales. They are tropical evergreen trees, shrubs and lianas. Unlike other gymnosperms they possess vessel elements in the xylem. Some species have been proposed to have been the first plants to be insect pollinated as they occur in association with the extinct pollinating scorpionflies. Gnetum subsect. Micrognemones - 2 species of lianas; tropical west Africa Gnetum subsect. Araeognemones - 9 species of lianas; tropical South America and Central America - Itua Gnetum sect. Scandentia - about 20 species of lianas; southern Asia Gnetum subsect. Sessiles Many Gnetum species are edible, with the seeds being roasted, and the foliage used as a leaf vegetable. Some are also valued in herbal medicine. ...http: //booksllc.net/?l=de