Arabis divaricarpa of Michigan Flora.

Sandy or gravelly clearings and borders of forests (especially aspen) and shores, rock outcrops and rocky summits.

The cauline leaves are usually numerous, short, and crowded, as in B. missouriensis, but the basal leaves are entire or slightly toothed and ± stellate-pubescent on both surfaces. The fruit is ordinarily widely spreading or even somewhat down-curved, up to 9.5 cm long, but on some plants the siliques are very short (ca. 2 cm), ascending on divaricate pedicels. Plants with very young fruit not displaying the strongly spreading aspect compared to the compact infructescence of Turritis glabra may be confused with the latter species, but differ in the shorter sepals and pink petals; in T. glabra, the pubescence at the base of the stem is generally denser, with more straight, spreading hairs. Apparently derived from a cross of the more western and northern B. collinsii and B. stricta.