"Stems prostrate, forming compact depressed patches 6 in.-24 in. diameter; branchlets excessively numerous, 1 in.-3 in. long, strict, erect." Lfy twigs 1·5-2 mm. diam., tetragonous but serrate rather than smooth in outline because of projecting lf-tips. Lvs erect, 1·5 × 1·5-2 mm., shortly and bluntly deltoid above the rather narrow base, the whole tumid and rounded with slightly cucullate tip; marginal cilia inconspicuous. Infls to 12 mm. long; peduncle c. 2 mm. long. Fls in up to 4 pairs, rather laxly arranged, pedicels to 1 mm. long. Bracts 2 mm. long, broadly oblong-ovate. Calyx-lobes 2.5-3 mm. long, narrow-oblong. Corolla-tube = calyx, rather narrow, lobes c. 3 × 2 mm. ♂ and ♀ sts less distinct than in the last three spp. Capsule 3·5 × 2 mm., narrowed towards tip.