Family
Nyctaginaceae (Four o’clock family)
Abronia umbellata breviflora. Photo: (c) Oregon Department of Agriculture, some rights reserved (CC BY-NC-ND)
Nyctaginaceae, the four o’clock family, is a family of around 33 genera and 290 species of flowering plants, widely distributed in tropical and subtropical regions, with a few representatives in temperate regions. The family has a unique fruit type, called an “anthocarp”, and many genera have extremely large (>100 µm) pollen grains.
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