Perennial, up to 10cm. tall, forming dense tufts or compact swards c. 15 cm. diam. Stems much-branched from stock, wiry. Basal lvs ± (8)-10-15-(20) × 0·8-1-(2) mm., narrowly linear- to oblong-lanceolate, thin, acute to subacute, narrowed into flat petiole up to 5 mm. long. Cauline lvs 2-3 pairs, sessile, linear to filiform or reduced to bracts. Fls solitary, terminal, (6)-10-15 mm. long. Calyx cut at least 4/5 way into linear-subulate, acute to acuminate, sts apiculate lobes 7-10 × 0·5-1·5 mm., with midrib evident. Corolla cut fully ⅔ way into ovate, acute, apiculate lobes 10-12 × 2-3 mm.