Leaves in whorls of (6)8(10), 1-nerved, (7)10–15 x (0.5)1–2(3) mm., linear to narrowly elliptic, with a distinct, whitish acumen at apex, narrowed to base; upper surface smooth or with a few scattered, ± straight hairs, lower surface with hairs at least on the midrib, the usually reflexed margins with densely spaced recurved prickles.
Corolla 2–2.5(3) mm. in diam., rotate, often hairy outside, mostly pale or bright yellow; lobes much longer than wide, ± triangular, acuminate; stamens c. half as long as lobes; ovary c. 0.3–0.5 mm. long.
Inflorescence ± cylindrical, cymes many-flowered, ultimate branches often ebracteate; peduncles 1–2 mm. long, hairy, pedicels 1–3 mm. long, hairy or glabrous, divaricate in fruit.
Stems scrambling or ± climbing, c. 0.4–2(3) m. long, ± much-branched, with ± straight, spreading hairs on the 4 distinct angles.
Fruit mostly glabrous; mericarps ± globose, each c. 1 mm. in diam.
Perennial.