Adenandra uniflora Willd.

A 10-40 cm high shrublet, usually erect and sparsely branched when young, later with spreading, often crowded and irregularly twisted brunches giving the plant a rather shrubby habit. Young branches puberulent to pilose, yellowish: later defoliated, glabrescent, light brown, and marked with leaf-scars: finally ash-grey. Leaves densely to rather sparsely set, often horizontally patent on the lower part of the branches, erecto-patent and more or less imbricated above; petiole 0.5-1 mm long, appressed, yellowish, glabrous to ciliate; blade usually oblong to lanceolate (rarely shorter and ovate to elliptic), 4-14 x 1.5-3.2 mm, moderately acute, sometimes with recurved apex, relatively thin, with revolute margins (often rolling when dry), glabrous to pilose, above smooth, below with 10-60 often rather inconspicuous glandular dots. Upper leaves successively somewhat shorter, the uppermost more or less crowded. Flowers subsessile or rarely on pedicels up to 4 mm long, usually solitary. Bracts and bracteoles leaf-like and not markedly different from the uppermost leaves, ovate to lanceolate, acute. Calyx 7-11 mm, divided to c. 85%, lower part glabrous or sparsely pilose, green or brownish green, glandular-punctate: segments broadly lanceolate, 6.0-9.3 x 2.0-4.5 mm, scarcely overlapping or not, acute, lower half or two thirds usually long-ciliate, sometimes purple towards the apex. Petals white to pink on both sides, usually glabrous, often semi-translucent and thinner than in A. villosa, claw 1-3 mm long, more or less gradually widening into the limb; the latter obovate to almost orbicular (rarely more elongate), 6-11(-16) x 5.5-10 mm, obtuse to truncate, sometimes ciliate towards the apex. Staminodes erect or slightly incurved, 2.5-4.4 mm long, yellowish, patently pilose, apically incurved and slightly widening into a discoid, elliptic to orbicular, concave to cupular gland c. 0.5 mm across. Stamens: filaments subulate, 1.2-2 mm long at anthesis and c. 0.7 mm broad at the base, slightly incurved, yellowish, patently pilose; anthers ovoid, dorsifixed, versatile, 1.5-2.2 x 1.1-1.6 mm, glabrous, brown, tipped by a shortly stipitate, discoid, ovate to triangular, concave gland e. 0.0 x 0.7 mm. Ovary globose, c. 1.5 mm across, greenish, glabrous, rather densely covered with stipitate glands in the upper part: style c. 1 mm long at anthesis, stout, recurved (but soon erect); stigma capitate to discoid, brown. Mature capsule shorter than and enclosed by the large, leaf-like calyx segments, somewhat transversely rugose, upper part sparsely papillate, green to brownish-green. Seeds ovoid, 3.0-3.6 x 1.8-2.2 mm.