A much branched, rather lax shrub, about 50 cm high, with wiry branches. Branchlets slender, clothed with short, adpressed pubescence. Leaves mostly 6-8 mm long: lamina erect-spreading, linear or lanceolate-linear, mucronate, somewhat cordate at base, semiterete, often slightly recurved at the apex, with closely revolute margins covering the lower surface; upper surface conspicuously tubercled on the sides and about the apex, at first pilose or puberulous on those parts, elsewhere smooth: petiole 0.5-1 mm long. Capitula 5-6 mm wide, hemisphaeric, occasionally subtended by 2 or 3 short leaves, frequently on very short, sparsely leafy branchlets in panicle-like clusters. Bracts 2-2.5 mm long, obovate or oblong, acute, villous on the outer surface. Bracteoles 2, 1.5-2 mm long, linear, villous on the outer surface. Blowers sessile, about 2 mm long: calyx-tube scarcely 0.5 mm deep, broadly cyathiform, glabrous, lined with a thin disc: sepals 0.5 mm long, deltoid-ovate, acute, convex above the middle, densely tomentose on the outer surface. Petals 0.5 mm long, inserted at or shortly within the mouth of the tube: lamina orbicular, more or less cucullate in the upper part: claw about half as long, cuneate. Anthers orbicular, 1-celled. Ovary broadly obconic, glabrous. Stigma subsessile, tripartite. Fruit about 4 mm long, obovate-rotundate, smooth or wrinkled, chestnut-brown, with a small calyx-area upon the summit.
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Like P. minutiflora but sprawling rather than rounded, leaves mostly 5-8 mm long, conspicuously tubercled along edges and cordate at base, capitula often in panicles.