DCHP-1 Online
reindeer lichen Obs. 
a whitish-gray lichen, Cladonia rangiferina, a staple food of the caribou.
See also: caribou moss
- 1770 (1792) [Caribou] find there many extensive tracts of land destitute of wood, and covered with plenty of Reindeer Lichen . . . and other herbage.
- 1770 (1792) [Caribou] find there many extensive tracts of land destitute of wood, and covered with plenty of Reindeer Lichen . . . and other herbage.