ONAGRACEAE - Evening Primrose Family

Mostly herbs

Leaves alternate, opposite, or whorled

Flowers bisexual, actinomorphic, in a variety of infls., gynoecium of 4 carpels with 1 locule, style sometimes parted or lobed, reflecting the number of carpels

Fruit a capsule, nut or berry

Seeds with little or no endosperm

17 genera, 675 species

Onagraceae is a well-defined family of little economic importance

Diagnostic characteristics: 4-merous flowers, inferior ovary, lobed or parted style branch, often showy flowers, hypanthium with CA, CO, and A inserted on its rim