rock tripe


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rock tripe

n
(Plants) Canadian any of various edible lichens, esp of the genus Umbilicaria, that grow on rocks and are used in the North as a survival food
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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What, in nature, is rock tripe (umbilicaria) and how it is used by humans?
Among the supplies left behind were this chocolate and 'tripe de roche', or rock tripe. Captain AH Markham recovered the items in 1873, following his unsuccessful expedition to the North Pole, and donated them to the Royal Geographical Society archives.