Annual or perennial herbs, glabrous and glaucescent. Leaves much divided into linear segments. This genus is distinguished by the sepals of its calyx cohering in the form of a cap, which is pushed off by the expanding petals. Capsule linear. Named after a botanist. The four or five species are all natives of Northwestern America.

1. E. Galifomica. - This species was the first introduced. It is a straggling much-branched plant with large vase-shaped flowers, bright yellow in the typical form; but varieties with white, pinkish, paler yellow, and other tints are known.

2. E. tenuifolia. - A much smaller plant, with the segments of the leaves almost thread-like. Both are hardy and pretty, especially the former, and continue in flower for a long period.