This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
1. C. pulchella (fig. 105). This grows from 18 inches to 2 feet high, with glabrescent linear leaves and large flowers having deeply trilobate petals with a pair of small opposite teeth on the claws. Under cultivation this has given birth to a double variety, and the flowers vary in colour from lilac-purple to white. There is also a variety with entire petals.
2. C. elegans. - A rather smaller flowered species. Leaves lanceolate, dentate. Petals entire, without teeth on the claw.
C. gauroides, syn. C. rhomboidea, is a less attractive species with smaller purplish flowers.
Fig. 105. Clarkia pukhella. (1/6 nat. size.)