erect, branching; twigs downy, leafy; leaves alternate, rarely opposite, on very short petioles, spreading or erect, lanceolate or linear, sub-obtuse, glabrous, with revolute, membranous margins, one-nerved beneath; peduncles corymbose, much longer than the leaves, bibracteolate; calyx glabrous, its segments ovate or sub-lanceolate, erect in flower and fruit, one-third as long as the ovate-sub-cordate petals. 6–8 inches to a foot high, with erect or ascending branches. Lower leaves 4–6 lines long, 1 line wide at base, upper 3–4 lines long. Peduncles 3–8 at the end of the twigs, uncial or shorter. Bracts 1/2 line long, subulate, obtuse. Calyx 1 1/2 lines long, glandular. Petals obtuse or mucronulate, white, reddish beneath. Capsule 4 times as long as the calyx, muricate, obtuse.—Very close to A. marginata, R. & Sch., if not a mere variety.