Stems 10-80 mm long, 10-15 mm thick, usually decumbent, occasionally prostrate, green to brownish green sometimes faintly mottled with purple; tubercles 2-4 mm long, tapering to acute and occasionally hard tooth. Pedicel 3-25 mm long, ±0.75 mm thick, ascending to erect and holding flower facing upwards, often slightly fluted towards apex; sepals 1.5-2.0 mm long, ±0.5 mm broad at base, lanceolate, acute, often with a few papillae dorsally near base. Corolla 10-17 mm diam., ± rotate; outside brownish green, smooth; inside deep yellow with pink to maroon on base of lobes and mouth of tube, with tube pale yellow, smooth; tube ±0.5 mm long, broad and shallow and containing lower half of gynostegium; lobes 5-7 mm long, 2-3 mm broad at base, ascending to spreading, narrowly ovate-deltate, slightly broader at base then narrowing gradually to broadly acute tip, convex above from margins strongly folded back and usually nearly touching one other underneath. Corona ±1.5 mm tall, 2.5 mm broad, dark purple-black, raised on very short stipe; outer lobes 1 mm long, erect, bifid to below middle into slender diverging terete to slightly flattened lobules, with pectinate portion behind inner lobes divided into 3 or more spreading terete obtuse lobules nearly reaching same height as outer lobes (lobules rarely absent); inner lobes ±0.5 mm long, covering anthers and often meeting in centre, deltoid, emarginate.
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Like P. longipes but corolla lobes more than twice as long as broad, corona dark purple-black, inner lobes covering anthers.
Plant like P. articulata. Flowers campanulate, smooth, deep yellow with pink to reddish purple centre.
A succulent. The stems are 1-8 cm long and 1-1.5 cm wide.