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Unformatted text preview: Sale of herbal supplements containing ephedra is now banned in the United States by the FDA after several deaths were attributed to its use. Gnetum Members of the genus, , are vines or shrubby trees of the wet tropics of Indonesia, South America and Africa. Gnetophyta - 2 Welwitschia is restricted to the Namib desert of Namibia and adjacent regions of southwestern Africa between 14 o 35 o S Latitude from the western coast to 100 miles inland in areas of about 2" of annual precipitation. has two large, basal strap-shaped leaves that grow from a meristem on its basal stem. It has a deep taproot that grows down toward the water table. The leaves become shredded at the tips with time and the plant appears to be a rosette of many leaves. For reproduction has an female tube which grows to meet the pollen tube for reproduction. Welwitschia mirabilis Male Strobilus Female...
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This document was uploaded on 01/06/2012.
- Spring '09