DCHP-1 Online
rock weed 
an edible lichen of the genus, Umbilicaria (or, less often, the genus Gyrophora), having circular, leathery, grayto-brownish thalli found attached to certain rocks by a threadlike holdfast.
See also: rock-tripe
- 1793 (1933) These figures are made by scratching the Rock weed (moss) off the Rocks with the Point of a knife or some other instrument.
- 1821 (1938) Our people . . . for three days past have subsisted chiefly on rock weed.
- 1915 The "rock weed," wakwund (rock tripe) is often eaten in the bush when other foods fail. It is scraped off the rocks with a flat stick into a blanket, then washed and boiled and eaten. The water becomes a little slimy, but it makes a nourishing soup.
- 1793 (1933) These figures are made by scratching the Rock weed (moss) off the Rocks with the Point of a knife or some other instrument.