Erect, slender, shrublet somewhat variable in habit and appearance, 15-60 cm (1/2 to 2 ft) in height. Branches numerous, erect or spreading or, when young and grown in very wet places, subsimple, virgate and very slender with fewer and smaller flowers, glabrous, reddish; Leaves 3-5 mm long, commonly 3-nate, rarely 4-nate or opposite on the same plant, erect or subspreading, narrow-linear, acute, keeled, faintly sulcate, glabrous. Flowers generally solitary, corolline; peduncles 2-3 mm long puberulous; bracts small, remote or median, rarely subapproximate. Sepals 3-3.5 mm long, from ovate and acute to lanceolate and long-acuminate, scarious, glabrous, margins mostly naked, rarely ciliate, coloured. Corolla very variable in size and shape, 5-7 mm long, tubular-campanulate, cyathiform, broad-cyathiform or suburceolate, bright yellow, more rarely cream-coloured, dry, glabrous; lobes 1/4-1/2 the length of the tube, erect, more rarely spreading, obtuse. Anthers included, 1-1.3 mm long, lateral, oblong-cuneate, obtuse, minutely scabrid, generally muticous, sometimes minutely toothed at the base; pore about 1/2 the length of the cell; Ovary turbinate, glabrous; style included; stigma capitellate, small.
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Erect, slender shrublet to 60 cm. Flowers small, bell-shaped, yellow.