Britannica Concise Encyclopedia: chrysanthemum
Any of the ornamental plants that make up the genus Chrysanthemum, in the composite family. The genus includes about 100 species native primarily to subtropical and temperate areas of the Old World. Cultivated species, often called mums, have large flower heads; those of wild species are much smaller. Most species have aromatic, alternate leaves. Some have both disk and ray flowers in the heads; others lack ray flowers. Costmary (C. balsamita), pyrethrum, marguerite, Shasta daisy (hybrid forms of C. maximum), florists\' chrysanthemum (C. morifolium), feverfew (C. parthenium), corn marigold (C. segetum), and tansy are popular garden plants. Feverfew and pyrethrum are used in insecticides; feverfew and tansy were formerly used in medicines.
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以上是"简明大英百科全书"的有关章节.
菊属(genus )约有一百个原生种(species)
没有说明有多少个培育品种.( Cultivated species).
可能精确统计不容易. |