The Cactaceae
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Description: Description of the cactus family, with photos and short profiles of several representative species.
Flowering Plant Families, UH Botany The Cactaceae are mostly spiny succulents with photosynthetic stems comprising 30-200 genera and 1,000 to 2,000 species further characterized by the presence of betalains, and p-plastids. The leaves are alternate, generally extremely reduced and ephemeral or absent, or rarely they are well developed and fleshy. The leaves are associated with highly modified axillary buds or shoots called areoles that bear spines. The flowers are mostly bisexual and actinomorphic and commonly have many weakly differentiated perianth segments arising from an epigynous zone. The androecium typically consists of a very large number of stamens arising from the inner face of the epigynous zone. The gynoecium consists of a compound pistil of 3-many carpels, an equal number of stigmas, and an equal number of parietal placentae with numerous ovules in the single locule of the inferior ovary. The fruit is a berry, often with spines or bristles.
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| Page title: | Flowering Plant Families, UH Botany |
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| NS | Name Servers: DNS1.HAWAII.EDU 128.171.3.13 DNS2.HAWAII.EDU 128.171.1.1 |
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| Date | activated: 27-Oct-1986 last updated: 24-May-2011 expires: 31-Jul-2014 |