Orthodicranum (Bruch & W. P. Schimper) Loeske, 1910.

Orthodicranum tauricum, photo by Wilson

Our species of Orthodicranum will be among the easiest to identify of California mosses. Any emerald-green acrocarpous plant with subulate leaves growing in dense wefts on logs or on tree trunks (primarily coniferous) should be examined for a pattern of regular breaking of leaf tips. Orthodicranum tauricum commonly accompanies Aulacomnium androgynum and Dicranoweisia cirrata on logs and tree trunks. The dispersal of the leaf tip fragments may function as a primary means of asexual reproduction.
see key to Dicranum Etc.

Orthodicranum tauricum (Sapehin) Smirnova