Acmadenia patentifolia I.Williams

Shrubs 1 m tall, spreading to 2 m diam., forming a dense rounded bush with many branches arising from a single stem at base. Branches numerous, erect, short, glabrous, irregularly bent, dichotomous; bark rough, ashy brown. Branch-lets numerous, erect, very short, sub-sinuous, sparsely and minutely puberulous, reddish, lumpy with oil glands at open spaces, often encrusted with small pieces of a red resinous exudate at the base of the leaves. Leaves 1.8-2.7 mm long, 1.3-1.6 mm broad, oblong-lanceolate, obtuse, thick, sessile, spreading, alternate; apex with an immersed callus; margins rounded with the cartilage immersed; midrib rounded with 1-3 gland dots; the base thinly puberulous clasping the stem. Inflorescence terminal, sessile, solitary or paired; flower 6 mm diam., with the white petals spreading to reveal the green calyx lobes and the green disc; calyx minutely puberulous. Bract 1.5 mm long, 1-1.2 mm broad, leaf-like, somewhat ciliolate at base. Bracteoles two, 1.4 mm long, 1 mm broad, broadly lanceolate, obtuse, 1-3 gland-dotted; margins below broadly translucent, minutely and sparsely ciliolate, thinly puberulous; adaxial surface minutely puberulous. Calyx lobes five, 1.5 mm long, 1-1.2 mm broad, oblong, obtuse, thick at the apex, sparsely gland-dotted, sparsely and minutely puberulous inside and at the sides below. Petals five, 2.6-2.8 mm long; limb 2 mm long, 1.3 mm broad, lanceolate, sub-obtuse, glabrous, 1-3 gland-dotted, white, spreading-recurved, margins minutely denticulate; claw 0.8 mm long, smooth. Staminodes five, 0.8 mm long, 0.25 mm broad at base, transversely flattened below, arising near the base of the petal, apical gland 0.15 mm diam., globose, pale yellow. Filaments five, becoming 1.5 mm long, acicular, glabrous, erect. Anthers five, before anthesis 1 mm long, 0.6 mm broad, apical gland small semi-immersed. Pollen 43 µ long, 23 µ broad, elliptic. Disc erect, green, thick, exudes nectar, slightly exceeds the ovary. Stigma almost 0.3 mm diam., capitellate. Style becoming 1 mm long, erect, glabrous, persisting. Ovary 5-carpellate, 0.8 mm long, 0.8 mm diam., glabrous, apices globose. Fruit 5-carpellate, 16 mm long, 7 mm diam., glabrous, green, multi-glanddotted; horns 4 mm long, spreading at ±45°, tinged with purple, apex with a small immersed gland. Seed 5-5.6 mm long excluding the aril, 2-2.3 mm broad, black, shining; aril 1-1.5 mm long, white.