Stem prostrate, rooting at nodes, c. 1 mm. diam., hairy in younger parts, interwoven in extensive mats. Lvs laxly arranged; lamina soft-textured, 3-10 mm. long, orbicular to broadly oval or almost reniform, entire or very obscurely toothed, glab. except sts on lowest part of margins; petiole us. much > lamina, up to 3 cm. long, narrow, sparsely hairy on margins. Infl. apparently cymose, us. of only 2 fls each associated with two lflike bracts. Pedicels short in fl. but elongating to carry fr. well above lvs, hairs few to many, tapering. Calyx split anteriorally almost to base, the other four clefts to less than halfway; lobes broad, obtuse, almost glab. Corolla up to 8 mm. diam., glab. outside, tube up to 5 mm. long, oblique, bulging posteriorally near base and inclined to project between the two anterior calyx-lobes. Fr. altogether included in calyx and not dehisced in specimens seen.

DIST.: S., St. Known in S. only from Gouland Downs, W. B. Brockie and Lake Alabaster, W. A. Thomson.

Type locality: Stewart Id, Rakiahua Valley, in wet ground. Type: Cockayne states (Rep. bot. Surv. St. Id 1909, 44): "All my flowering specimens were sent to Dr. L. Diels".

This stands apart from all other N.Z. spp. and in habit seems to approach most nearly the Tasmanian O. integrifolia R. Br.