Adenandra acuta Schltr.

An ascending, rather dense shrublet with slender branches, 25-60 cm high. Young branches puberulent, reddish-brown; later glabrescent, comparatively smooth, turning dark ash-grey. Leaves rather sparsely to densely set, erect to erecto-patent, loosely imbricated; petiole appressed, 0.5-0.8 mm long, yellowish, with rather conspicuous, usually dark, knob-like stipules at the base; blade lanceolate, 6-9 x 1.8-2.4 mm, ciliate when young, acute, ± convex (margins not thickened), above smooth, below with 20-60 scattered glandular dots and sometimes also sparsely pubescent. Uppermost leaves gradually becoming smaller, not forming a distinct involucre. Flowers very shortly pedicellate in 1-5-flowered terminal heads. Bracts similar to the uppermost leaves, lanceolate to subulate, ± involute, 3.5-5.5 x 0.8-1.4 mm, glabrous or ciliate. Bracteoles lanceolate, 4.0-6.0 x 0.9-1.3 mm, often with an elongated involute apex, thus appearing sharply acute to cuspidate, more or less ciliate, below usually with scarious margins, above green or sometimes purple-tipped. Calyx 7.5-9.5 min, very deeply divided, glabrous; segments lanceolate, 6.0-8.5 x 2.2-3.0 mm, only slightly overlapping or not, ciliate, upper half usually involute, thus appearing sharply acute to cuspidate, green below, usually turning dark purple in the upper half or third. Petals pale pinkish outside, white inside, glabrous; claw 2-2.5 mm long, gradually merging into the limb; the latter obovate, 3.5-9.5 x 5.5-7.2 mm, obtuse to truncate, apiculate (i.e., with the apex abruptly contracted into a small, thickened, reddish knob). Staminodes 2.5-3.3 mm long, erect, uniformly broad, patently pilose, tipped by a slightly incurved, semiglobose, more or less cupular gland c. 0.4 mm across. Stamens: filaments 1.0-1.7 mm long at anthesis, rather uniformly broad, but narrowed at the attachment of the anther, patently pilose, erect or slightly incurved; anthers ovoid to broadly oblong, dorsifixed, versatile, 1.0-1.4 x 0.8-1.0 mm, brown, glabrous, with a shortly stipitate, capitate to discoid, more or less cupular gland c. 0.4 mm across. Ovary globose, upper part papillate (from pale, stipitate glands), c. 1 mm across; style 1-1.5 mm at anthesis, stout, recurved; stigma capitate to discoid, brown. Mature capsule conspicuously shorter than the calyx, slightly rugose, upper part sparsely papillate, light brown. Seeds ovoid, somewhat flattened laterally, 2.8-3.5 x 1.4-1.8 mm.