Relating to or denoting plants of the primrose family (Primulaceae).
- Floral appendages on all four whorls are reduced to a relatively small number, in this case five, i.e., the primulaceous flower is fully pentamerous.
- Especially noticeable in this respect are the flowers of Centunculus minimus, a tiny Primulaceous plant, whose cup-shaped corolla is carpeted at the bottom with slightly-arched, large, juicy, superficial cells, which glitter like silver in the sun.
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