orthotricheæ

from The Century Dictionary.

• A tribe of mosses, taking its name from the genus Orthotrichum, characterized by having tufted plants with leaves of close texture, a mitriform, often hairy calyptra, and a simple or double peristome, the outer row of eight bigeminate or sixteen geminate, flat, short, entire or perforate teeth, the inner of eight or sixteen simple filiform cilia or lanceolate segments.