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Perennial trailing herb from a woody rhizome, mat-forming; stems reclining, to 1 m long, slightly woody, minutely sparse-hairy, 4-angled, sometimes rooting, often with short ascending branches; aromatic.
Opposite, egg-shaped to almost round, 1-3.5 cm long, tips rounded, minutely sparse-hairy, margins irregularly blunt-toothed; short-stalked or nearly unstalked.
Inflorescence of solitary (-3) flower in leaf axils; flower stalks slender, 5-15 mm long; corollas tubular, white or purple-tinged, 7-10 mm long, minutely stiff-hairy on outside, lips 2, short, the lower lip spreading, 3-lobed, the upper lip erect, notched; calyces tubular, 4-5 mm long, minutely hairy, 12- to 15-veined, with 5 short, pointed teeth.
Nutlets, 4 clustered together, about 1 mm long, smooth, shiny brown.
Source: The Illustrated Flora of British Columbia