Rock Cress

rock cress (arabis alpina)

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Arabis alpina, commonly known as mountain rock-cress or alpine rock cress, is a mat-forming, tufted, procumbent, evergreen perennial of the mustard family that typically grows to 8-10” tall but spreads to 20” wide or more. It features loose spreading rosettes of toothed, obovate, gray-green basal leaves (to 2” long), shorter ovate stem leaves and tiny, 4-petaled, white flowers (each to 1/2” long) which bloom in spring. It is native to crevices of limestone rocks, along streams and in calcareous alpine meadows of Europe, Canada and parts of the northern U.S. from Maine to Wisconsin south to Tennessee.