haplolæneæ

from The Century Dictionary.

• A tribe of frondose liverworts (Hepaticæ), of the division Jungermanniaceæ, proposed by Nees von Esenbeck in 1838, and characterized by a one-leafed involucre without any true perianth, a spherical capsule, and dichotomous-ribbed fronds. It comprises some of the finest of the frondose liverworts.