Acmadenia rupicola I.Williams

Shrubs 0.25 m tall, spreading up to 0.50 m diam., single-stemmed at base. Branches tough, tending to spread; bark rough with leaf scars; annual increments very small. Branchlets short, erect, puberulous, hidden by the leaves. Leaves (including the petiole 1.6 mm long) 7.4-8.7 mm long, 2-2.3 mm broad, oblong, alternate, 5-ranked, (or on some lower shoots up to 13 mm long, 2.4 mm broad, lanceolate, opposite, decussate), obtuse, erect, imbricate, puberulous, inconspicuously gland-dotted, towards apex triangular in section; midrib prominent; margins opaque. Inflorescence about 10 mm diam., solitary, terminal, pale pink, involucred. Bracts two (including the petiole 2.5 mm long), 8 mm long, 1.6-1.7 mm broad, lanceolate, otherwise leaf-like. Bracteoles two, 7 mm long, 1.6 mm broad, the lower 2 mm recognisable as a petiole, lanceolate above, oblong below with margins ciliolate, narrowly translucent; apex slightly reddened, otherwise leaf-like. Calyx lobes five, 6-7 mm long, 1.6-1.8 mm broad, in the same flower, oblong, sub-acute puberulous, gland dots in 2 rows, reddened above; margins below ciliolate, narrowly translucent; adaxially puberulous below. Petals five, 7-8.3 mm long, 4-4.9 mm broad, orbicular, apiculate, minutely ciliolate at the apex, gland-dotted, pink, with a short claw about 2.5 mm long, narrowing below, glabrous or pubescent above, margins ciliolate, midrib thickened. Staminodes five, 1 mm long, acicular, translucent above. Filaments five, becoming 1.6 mm long, stout, glabrous, pale. Anthers five, 2.2 mm long including a stout, conical, apical gland 0.9 mm long, 0.8 mm broad, becoming sticky at the tip after anthesis. Pollen 41 µ, long, 34 µ broad, almost spherical. Disc obvallate, at first exceeds the ovary equalling the stigma, quite narrow and level above, green, exudes nectar. Stigma 0.6 mm diam., globose, green, capitate. Style becoming 1 mm long, erect, glabrous. Ovary 5-carpellate, 0.7 mm long, 0.8 mm diam., apices sparsely pubescent to either side of an immersed gland, otherwise glabrous. Fruit 5-carpellate, 4.9 mm long, 4 mm diam., involucrate; carpels puberulous, gland-dotted; horns c. 0.7 mm long, apical gland large, facing outward. Seed 3.5 mm long, 1.5 mm broad, black, shining, somewhat kidney-shaped.