A genus of one herbaceous species having the same quaternary structure of the flowers and plumose seeds as Epilobium, but the calyx is coloured, and the tube prolonged above the ovary. A commemorative name.

1. Z. Californica. - A much-branched dwarf plant bearing sessile linear-lanceolate pubescent leaves and axillary solitary sessile scarlet flowers with a long slender projecting style, resembling those of a Fuchsia. It is a native of California, flowering in June.