Description: This plant forms large patches with curling edges. The top of the plant is usually black. The underside is lighter in color.
Habitat and Distribution: Look on rocks and boulders for this plant. It is common throughout North America.
Edible Parts: The entire plant is edible. Scrape it off the rock and wash it to remove grit. The plant may be dry and crunchy; soak it in water until it becomes soft. Rock tripes may contain large quantities of bitter substances; soaking or boiling the plant in several changes of water will remove the bitterness.
There are some reports of poisoning from rock tripe, so apply the Universal Edibility Test.
All text and images from the U.S. Army Field Manual 3-05.70: Survival.
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