About Arabis pycnocarpa M.Hopkins
Arabis pycnocarpa M.Hopkins is a small perennial or biennial plant that bears white flowers in spring. Two named varieties of this species are distinguished by differences in pubescence. Arabis pycnocarpa var. adpressipilis is native only to eastern North America, while Arabis pycnocarpa var. pycnocarpa is widespread across North America and Asia.