About 60 cm high. Branchlets hispidulous. Leaves about 4 mm long at maturity, linear, slightly narrowed towards the base, obtuse, ustulate at the apex, rounded-convex beneath, slightly convex and keeled above, slightly incurved from the middle, hispid on both surfaces. Flowers several or many together: pedicels 0-5 mm long. Bracteoles about 8, 1 mm long, ovate-lanceolate, obtuse, ciliate. Calyx-tube narrowly obconic, tubercled: calyx-lobes 0-75 mm long, lanceolate, acute, glabrous, bluntly keeled. Petals 2-5 mm long, ovate, obtuse, with the basal part often narrowed, white. Anthers scarcely 0-75 mm long, lanceolate, obtuse, reaching to the upper half of the petals. Ovary papillate round the top: stylar column 1 mm long: stigmas rotund, indistinct. Fruit unknown.
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Like A. laxa but leaves stiffly hairy and petals ovate.