Shrubs 200-300 mm tall, many-stemmed with a persistent root, coppicing after fires. Branches short, erect, slender, sparsely puberulous becoming glabrous, pale becoming reddish-brown, well-clothed with leaves. Leaves 4-6 mm long, 1, 4-1,8 mm broad, lanceolate, acute, sessile, alternate, erect, imbricate; apex often trunculate; margins ciliolate, gland-dotted; adaxial surface glabrous, flat; abaxial surface sparsely puberulous or glabrescent, gland-dotted along the midrib. Inflorescence terminal, sessile, up to 8-aggregate. Bract one to each flower, outermost leaf-like, inner 1.2 mm long, 0.7 mm broad, lanceolate, puberulous, ciliolate. Bracteoles two, 0.8 mm long, 0.6 mm broad, ovate-lanceolate puberulous, ciliolate. Calyx lobes five, 2 mm long, 1 mm broad, lanceolate obtuse or trunculate, ciliolate; midrib sparsely pubescent above. Petals five, 5 mm long; limb 1.8 mm diam., approximately orbicular, white; claw 3.2 mm long, 1.1 mm broad, strongly bearded above with erect hairs, shorter crisped pubescent below, eciliate, narrowing and glabrous towards the base. Staminodes five, 0.05 mm long, vestigial, situated in a depression on the disc at the base of the petal. Filaments five, becoming 6 mm long, glabrous, protruding. Anthers five, before anthesis 1.3 mm long, 0.7 mm broad, reddened, apical gland minute. Pollen 51-55 µ long, 21-23 µ diam., oblong. Disc green, closes over the ovary, exudes nectar. Stigma 0.12 diam., a minute red dot, simple. Style becoming 6 mm long, terete, glabrous, scarcely narrowing below. Ovary tri-carpellate, 0.6 mm diam., glabrous. Fruit 1.2 or 3-carpellate; carpels 12-14 mm long, glabrous, reddened; horns 3-5 mm long, erect or slightly recurved. Seed 5 mm long with the white aril protruding another Vi mm at the apex, 2 mm broad, black, matt.
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Like M. villosa but leaves smaller, 4-6 mm and flowers up to 8.