Northwest natives. Starlike, slender-petaled blossoms are carried on spikes in late spring, early summer; grasslike basal leaves dry quickly after bloom. Plant in consistently moist, fairly heavy soil, where bulbs can remain undisturbed for many years. Set bulbs 4 in. deep, 6 in. apart. To avoid premature sprouting, plant after weather cools in fall. Resistant to deer and rodents.
C. cusickii. Dense clusters of pale blue flowers are borne on stems that grow to 3 ft. tall. A white form is available.
C. leichtlinii. Large, handsome clusters of blue-to-creamy white flowers on stems to 4 ft. tall. 'Sacajawea' has white flowers and white-edged leaves. 'Semiplena' has creamy white semidouble blooms. C. l. leichtlinii (C. 'Alba') is white with a faint hint of blue. C. l. suksdorfii has blue-to-deep blue-violet flowers; its selection 'Blue Danube' is deep blue.
C. quamash (C. esculenta). Loose clusters of blue flowers on 1- to 2-ft. stems. Flowers of 'Orion' are deeper blue. 'Blue Melody' has dark blue flowers and cream-striped foliage.