Slender caulescent herb up to 50 mm; stem arising from bud on very short petiolode of basal leaf, bearing 1-3 pairs of opposite or subopposite leaves, thin (c. 0.75 mm diam.) but rather stiff, the whole plant clad with strongly patent sharply pointed hairs, frequently gland-tipped except on the leaves. Leaves: basal and cauline similar, narrowly oblong or very narrowly elliptic, c. 20 x 3 mm, blunt at the apex, gradually attenuate at the base, margin entire, slightly sinuate, the blade itself very thin, clad with patent hairs like the stem; midrib prominent below, lateral veins8-10 on each side, very weakly developed, ascending, anastomosing, not prominent below. Inflorescences solitary in the axils of all the cauline leaves; peduncle 10-15 mm; bracts minute; pedicels very slender, up to 5 mm. Calyx segments narrowly triangular, 1 x 0.5 mm, spreading, hairy. Corolla 3-4 mm long, white with 5-7 reddish stripes on the floor of the tube: tube 2-3 mm long, much swollen at the base and 2 mm diam., hairy outside, glabrous within; lower lip 1.5 mm; all lobes rounded c. 1 x 1 mm. Stamens arising near base of corolla; filaments 2 mm, curved, gradually swollen upwards, glabrous; anther lobes 0.5 mm; staminodes3, the laterals 1 mm, the posterior one smaller. Disc annular. Ovary1 mm, conic, rather abruptly narrowed, appressed-hairy; style 1.5 mm, with a few appressed hairs; stigma little wider than the style, strongly papillose, very faintly grooved. Capsule 4-5 mm long, with one complete twist of the spiral, slightly hairy. Seeds 0.25 mm long, verruculose.
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