"The flowers of pincushion cactus also were a food source for prehistoric Indians who lived in southwest Texas from 800 B.C. to 500 A.D. Studies of the coprolites from the Amisted area revealed pincushion cactus pollen, which indicates that the flowers were being eaten (Bryant, 1974)."
- Kelly Kindscher (1987) Edible Wild Plants of the Prarie: An Ethnobotanical Guide
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