Shrubby, with slender, erect, glabrous branches strongly ridged when dry. Leaves scattered, often remote, very narrow-linear or filiform, erect or appressed, 1/4–2 in. long, 1/2–2 lines broad. Flowers glabrous or pilose, in terminal, erect racemes; pedicels spreading, equalling or shorter than the outer sepals; bracts minute, caducous. Anterior sepals connate, entire or bidentate. Wing-sepals pale, oblong-or rotundate-ovate, shortly narrowed at the base with 3 principal looping (not coloured) nervures, persistent, 1/3 in. in length. Lateral petals ample, rotundate-obovate, narrowed below. Carina cristate. Capsule ovate- or quadrate-elliptical, retuse, exalate or the lobes more or less produced at each side of the notch, glabrous, about as broad as and at length nearly or quite equalling the wings.
