A. glabra is the tallest species, 2 to 4 feet, with yellowish-white petals, oblong or lance-shaped stem-leaves, pods 3 inches long, very narrow. Around rocks.

A. lyrata differs in having much cut and lyre-shaped root-leaves, with stem-leaves entire or sometimes toothed. Petals, long. Sepals, yellowish green.

These all bear rather small white blossoms in terminal, flatfish racemes, found in rocky woods.