Galled flowers produce no seeds and develop differently from uninfested buds and flowers (Figs. 1, 2), sometimes keeping their tepals completely or partially closed while the ovary enlarges. In rare cases, all six sepals and petals open, exposing the engorged, fruit-sized ovary.

Dasineura camassiae

This midge induces melon-shaped polythalamous galls in the flower ovaries of camas (Camassia quamash subsp. breviflora ad C. leichtlinii subsp. suksdorfii) in Oregon. Galls measure 10-25 mm long and can be either lemon yellow or purple like the petals of the flower.