Onagraceae lecture text

Flowers: Perfect, actinomorphic, 4-merous, with hypanthium; carpels syncarpous, ovary inferior; ovules often numerous, axile or parietal; pollen sometimes with viscin threads

Inflorescences: Solitary and axillary or in racemes or spikes

Fruits: Capsule or berry

Habit: Herbs or shrubs, sometimes aquatic

Leaves: Simple, opposite, whorled, or alternate, without stipules


  • Clarkia
  • Epilobium (fireweed)
  • Fuchsia
  • Ludwigia (false loosestrife)
  • Oenothera (evening primrose)

NOTE: It is unusual to have a hypanthium with an inferior ovary (but also in Rosaceae subfamily Maloideae)