Jepsonia parryi

Jepsonia parryi is an uncommon species of flowering plant in the saxifrage family known by the common names coast jepsonia and Parry's jepsonia.
It is native to the coast and inland hills chaparral of southern California and Baja California.

Jepsonia parryi is a small perennial herb producing usually only a single leaf from an unbranched caudex. The leaf is round or kidney-shaped and has a ruffled, lobed edge.
The plant flowers in fall, producing a naked brown peduncle holding a small inflorescence of fewer than four flowers. The tiny flower has purplish-veined petals each about half a centimeter long.
The fruit is a brown-striped green or tan capsule.

Jepsonia parryi (Saxifragaceae) has heterostylous flowers and is strongly self-incompatible. Pin flowers have long styles, large stigmas, short stamens, and numerous, small pollen grains with finely sculptured walls. Thrum flowers have short styles, small stigmas, long stamens, and fewer, larger pollen grains with coarsely sculptured walls. Pin plants and thrum plants occur in a 1:1 ratio in field populations. 

Although the insect pollinators of J. parryi transfer ample compatible pollen to pin and thrum stigmas to account for full seed production, much of the pollen deposited on stigmas is incompatible. Analysis of the pollen deposits on stigmas collected from field populations indicates that compatible "legitimate" pollination of pin and thrum flowers is essentially random and is not obviously aided by floral dimorphism. It is suggested that although heterostyly had a positive adaptive value in the past evolutionary history of Jepsonia it is no longer adaptive under the present pollination regime, although it is maintained because of its strong genetic fixity.