A North American genus of two species. C. esculenta, the uamash of the Indians, is a handsome plant, resembling the common blue Hyacinth, but larger. The leaves are linear, about a foot high, and the flower-scape about 18 inches.

Perianth 6-partite, the five upper segments closer together, the sixth standing by itself. The raceme is pendulous and furnished with long bracts. The bulbs are edible and largely collected by the Indians of Colombia.