Perennial or annual, dwarf, caespitose shrublet, single or in loose clumps, up to 0.1 m in diam., up to 50 mm high, roots thickened. Leaves opposite, ovate, shortly acute, yellow-green, smooth, apex ending in awns. Flowers borne in cymes, yellow, apex tinged reddish below, opening in late afternoon, closing at night. Flowering time spring to early autumn, peaking in Nov., Dec. Capsules 5-locular, closing bodies pyriform, expanding sheets reduced, expanding keels linear, acute, valve wings absent.
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