Undershrubs; branches smooth or verrucose, densely stellate-lepidote when young. Leaves alternate, simple, small, entire, revolute, stellate-lepidote below. Flowers clustered in a compact terminal head or solitary (M. ambiguum), small, sessile, subtended by foliar bracts. Sepals usually 5, free or united below. Petals 5, free, slightly imbricate in bud, narrowly elliptic, 2–3 mm long, with prominent subterminal gland, glabrous or sparsely to densely stellate-lepidote abaxially. Stamens 10, free, exceeding petals; filaments slender, glabrous or stellate-pilose; anthers ±basifixed, cordate-orbicular, c. 0.7 mm long, with small terminal gland. Disc absent. Ovary stellate-lepidote; carpels 2–4, free, not apiculate. Cocci hemispherical. Seed oblong-reniform; axial endocarp thin, caducous; aril linear; sclerotesta longitudinally rugulose; hilum linear; raphe small, shrunken.
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