Clarkia pulchella Pursh
Collected apparently northeast of Kamiah in Idaho Co., Idaho, 1 Jun 1806, Source)
A hardy annuals named after Captain William Clark of the Lewis and Clark Expedition. Clarkia's height ranges from 1 to 3 feet. The flowers have a distinctive one-inch long deep rose through lilac and light pink to white. Petals have a broad, three-lobed tip and a very narrow minutely toothed base. All flower parts come in sets of four.. An outstanding characteristic is the drooping buds before they open and the fact that single blooms normally have four petals. The plants rarely grow over 2 feet tall, It is in flower from June to October, and the seeds ripen from August to October.
The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and requires well-drained soil. The plant prefers acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It requires dry or moist soil. It is found in valleys and foothill through out Western North America.