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They die at the first killing frost. Mature plants reach a height of 16 to
40 inches. This plant needs to be pollinated, thereby reproducing sexually, and the primary
pollinators include bees and syrphid (wasp-like) flies. Groupings of the Shale-barren Rockcress
are small and generally number less than 20 individuals - although their number has been
noticed to fluctuate considerably.
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