Plant branched from base, becoming woody, sometimes tufted, up to 15-20 cm tall in leaf and up to about 60 cm in flower. Leaves not very dense, obovate-cuneate, oblanceolate to oblinear-lanceolate, 10-18 cm long 5-15 mm broad, tapering gradually to the stem-clasping base, obtuse or acute, mucronate, 3-nerved with the 2 outside nerves sometimes indistinct, surface smooth or slightly irregular and coriaceous when dry, pitting faint or absent. Scape 25-35 cm tall, unbranched or sparsely branched towards base, freely branched above, smooth below, becoming wrinkled when dry, sometimes minutely pitted towards the flowers; bracts subtending branches and branch-1ets broadly oblong-ovate, membranous-margined, those subtending the spikelets 2-3 mm long, very broad and obtuse with broad membranous margin. Spikelets 1-flowered, sessile, sometimes some appearing peduncled due to the reduction of the cyme; bract about 7 mm long, enveloping the base of the calyx, obtuse with broad membranous margin. Flowers shortly pedicellate. Calyx 1.2-1.4 cm long with cylindric tube in lower half, pilose towards base; limb with 5 ribs and 10 short broad lobes. Petals oblanceolate-oblong, obtuse, emarginate, longer than the calyx. Stamens with versatile anthers divided halfway from base. Ovary deeply 5-winged; styles 5, free.
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Like L. perigrinum but a tufted shrublet to 60 cm with leaves smooth on both surfaces and flowers mauve.