C. grandiflora: stem 1-1 1/2 foot high; leaves prominently veined, broadly ovate, the upper ones broadly lanceolate; flowers large, yellowish white, in a loose leafy spike, the bracts all longer than the ovary, and the lower ones leaf-like and longer than the flowers. - Woods and thickets. Fl. June.
C. ensifolia has narrower leaves and white flowers; and C. rubra has narrower leaves and red flowers. Both are rare.