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Similar Arabis aculeolata, Arabis macdonaldiana, Arabis lemmonii, Arabis auriculata, Arabis blepharophylla |
Arabis pycnocarpa, the slender rock cress, is a species of flowering plant in the mustard family. It is native to North America and eastern Asia, being found in rocky, calcareous areas. It is a small perennial or biennial that has white flowers in the spring.
Two varieties have been named that are distinguished by pubescence differences:
References
Arabis pycnocarpa Wikipedia(Text) CC BY-SA