black moss

noun4

1. •
   Any of numerous species of dark-coloured mosses (Bryophyta), possibly species of the genera Grimmia, Andreaea, Syntrichia, Cinclidotus.

   • There are, however, two general kinds of mosses; black moss, and whitish or yellow moss. The black moss is originally of a mahogany colour, but speedily becomes black upon exposure to the air. — 1823
2. •
   Tillandsia usneoides (Spanish moss), a flowering plant, particularly after it has been dried for use as stuffing and decoration.
3. •
   Nostoc flagelliforme (fat choy), a terrestrial cyanobacterium eaten in Chinese cuisine.
4. •
   (US) Bryoria fremontii (wila), a lichen eaten by First Peoples in North America.