erect, branched from the base, twigs downy, leafy; leaves opposite, very rarely alternate, with very short petioles, ovate-acuminate or lanceolate, mucronate, obtuse or obcordate at base, flattish, or with revolute margins, often sub-emarginate, glabrous, the upper mostly ciliolate or downy; peduncles corymbose, much longer than the leaves, bracteate above the middle; bracts linear-subulate; calyx pubescent, its lobes ovato-lanceolate, half as long as the elliptic-obovate petals. An undershrub, 6–12 inches high. Lower leaves often reflexed and larger, 6 lines long, 2–3 wide; the rest patulous, 2–4 lines long, a line wide, all smooth above, paler and punctate beneath, the glandular margin more or less revolute and the mucro reflexed. Peduncles pubescent or nearly glabrous, uncial or shorter. Bracts 1 1/2–2 lines long. Calyx 2 lines long, ciliolate. Petals obtuse or mucronulate, white above, reddish beneath, downy towards the point. The leaves, as in A. marginata & A. humilis, are sometimes pellucid-margined.
