Succulent shrubs or trees. Stems either composed of flattened joints or terete; branches tuberculate. Areoles with up to 30 spines; glochidia present. Leaves 0 or inconspicuous, caducous. Flowers solitary. Fruit purple, red or yellow. Derivation of name: based on Tournefort’s name for succulent plants from Opous, Boeotea, Greece. Worldwide: 200 species, N and S America. Tanzania: 0 taxa. |
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