Plants perennial, glabrous, with creeping rhizomes and elongated underground stolons. Stems erect or ascending, rarely almost pros-trate, branched at base and in distal 2 (in inflorescence), 7-30(-40) cm; shoots not crowded, ± elongated. Leaves: ocrea whitish or silvery, membranous; blade normally narrowly linear, or occasionally linear-lanceolate, usually not hastate, rarely some with indistinct basal lobes, 3-10 × 0.1-0.2(-0.4) cm, base narrowly cuneate, margins entire, flat or occasionally slightly revolute, apex acute or obtuse. Inflorescences terminal, occupying distal 2/ 3 of stem, usually lax and interrupted to top, paniculate, with branches often reflexed. Pedicels 1-4 mm. Flowers (3-)4-6(-8) in whorls; inner tepals distinctly enlarged, normally 2-2.6 × 1.5-2(-2.2) mm (free wing 0.3-0.5 mm wide), base cuneate, apex obtuse or subacute. Achenes brown or yellowish brown, 1.5-2 × 1-1.5 mm. 2n = 56.
Coastal rocks and arctic regions in Newfoundland. Sandy places, dunes, riverside terraces, gravels, in the Arctic Region and the alpine zone; at elevations up to 400 metres.
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