| |
| | NCCPG - The National Council for the Conservation of Plants and Gardens |
 | | The size of a genus varies from those with only one species, e.g. |
 | | Argyrocytisus, Bignonia and Ravenala, to such giants as Astragalus and Euphorbia (each with 2000 or more species, Acacia, Carex and Piper (with 1000-1500 species each), and near-giants like Allium, Dendrobium, Erica, Ficus, Oxalis, Rhododendron, Schefflera and Silene (each with 500-1000 species). |
 | | The limits and internal classification of, as well as the identification of species within, such large genera presents many difficulties, and separation of parts of some into smaller genera has in one or another instance often been proposed. |
| www.nccpg.com /Page.Aspx?Page=31 (1416 words) |
|