Cactus And Succulent Plants: Status Survey And Conservation by IUCN/SSC Cactus and Succulent Specialist Group, Sara
By IUCN/SSC Cactus and Succulent Specialist Group, Sara Oldfield
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Extra info for Cactus And Succulent Plants: Status Survey And Conservation Action Plan
Sample text
The species which contain alkaloids or bufadienolides, are generally unpalatable or even poisonous. (Hylotelephium, Orostachys, Rhodiola, Rosularia, Sedum). A remarkable feature of the Asian Crassulaceae is the predominance of taxa with annual, leafy, flowering shoots in combination with a rhizome (Rhodiola, c. , Sedum sect. ) or tuberous roots (Hylotelephium, c. ). Rhodiola is mainly found at high altitudes in the Himalayas, whereas Hyloptelephium and Sedum sect. Aizoon occur at less elevated and more mesic habitats from south-western China to eastern Asia.
The use of living plant material in systematic studies may to a large extent help to solve these disputes (as demonstrated, for example, by Praeger 1921, 1932; Froderstrom 1930-1936; Walther 1972), but at the higher taxonomic levels, especially concerning the delimitation of genera, there is still much disagreement among professional botanists. Recently a joint study by a small group of Crassulaceae experts, under the auspices of IOS, has resulted in the first draft of a list of genera accepted by consensus (Eggli et al.
Implementation and enforcement of existing legislation also need to be addressed. One catalyst for improving national legal protection for succulents is the development of increasingly comprehensive international legal obligations to protect threatened species and their habitats. The Berne Convention This Convention, applicable to the Council of Europe member states, was signed in 1979. The Convention provides for the conservation of wildlife and wildlife habitats in general and for the special protection of listed species.