Gray and Camissonia Link appear to have undergone speciation via polyploidization involving hybridization ( Raven, 1969 Wagner et al., 2007). Wagner & Hoch and closely related Eulobus Nutt.
The proportion of seeds outcrossed estimated at the population level from the segregation of allozyme polymorphism in progeny arrays ranged from 0.0–1.0 and correlated positively with flower size. Populations in Baja California toward the southern range limit, on the Channel Islands off California and north of Point Conception, California, to the northern range limit in southern Oregon are small-flowered (SF), SC, and predominantly selfing. (2012) showed that populations in southern California are large-flowered (LF), predominantly outcrossing, and either largely self-incompatible (SI) or self-compatible (SC). self-fertilization, providing opportunities to investigate the evolution of mating systems ( Eckert et al., 2006 Button et al., 2012). This species also exhibits striking variation in floral traits and the relative importance of outcrossing vs. Being restricted to coastal dunes, it is continuously distributed along a near-linear, easily accessed geographic range, providing opportunities for studying the ecology and evolution of geographic range limits ( Samis and Eckert, 2007, 2009). Wagner & Hoch (Onagraceae) is a diploid, bee-pollinated, short-lived perennial endemic to the Pacific coastal dunes of Baja California, California, and Oregon ( Raven, 1969 Wagner et al., 2007).
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