Perennial herb c. 0.1-0.7 m tall, erect to decumbent or ascending or rarely prostrate, from woody taproot, branching, rooting and sometimes woody at base, upper branches sometimes present, spread- ing to ascending, the whole plant up to the sepals (dorsally) greyish-villous to -pubescent. Stems green to pale reddish, 2-4-lined and compressed in and near inflorescence, otherwise terete, internodes mostly exceeding leaves. Leaves sessile; lamina 6-40(-70) x 2-16(-23) mm, narrowly oblong or oblong-lanceolate to rarely ovate-oblong, concolorous, chartaceous, not glaucous, plane, spreading; apex subobtuse to usually rounded, margin plane, entire or very rarely lower leaves sparsely glandular-subdentate, base rounded to usually cordate-amplexicaul; venation: 3(4) pairs of laterals curved-ascending from base or up to lower 0.4 of midrib, tertiary reticulation rather dense, often obscure; laminar glands pale, dense, subequal, not prominent, sometimes also with a few black, punctiform, scattered; intramarginal glands black, rather dense to sparse; marginal glands (very rarely present) amber, globose, prominent. Inflorescence (l)3-c. 5-flowered from up to 3 nodes, curved-corymbiform, becoming monochasial after first flower, some- times with flowering branches from up to most lower nodes, the whole then broadly triangular to cylindric; pedicels 1.5-3.5 mm; bracts not auriculate; bracteoles linear, usually with a few sessile black glands or (proximally) black-glandular-cilia. Flowers 15-30 mm in diam.; buds cylindric-ellipsoid, obtuse. Sepals 5-10 x 1.5- 2.5 mm, subequal, linear-lanceolate to lanceolate, long-aristate, entire to subentire; veins 3(5), unbranched; laminar glands pale, punctiform to slightly elongate; marginal glands black, 3-5 on each side, sessile, the arista reddish and very rarely with small black apical gland. Petals pale to bright yellow, often veined dorsally, 9-15 x 3-6.5 mm, c. 1.5 x sepals, oblanceolate, rounded, apiculus apiculate or absent; laminar glands pale, striiform to punctiform; marginal to inframarginal glands black, not or scarcely prominent. Stamens c. 30-50, clearly 3-fascicled, longest 6-11 mm, 0.6-0.65 x petals; anther gland black. Ovary 2-3 x 1-2 mm, ovoid-ellipsoid to ellipsoid; styles 3, 5-7 mm, 2-3 x ovary, widely spreading-incurved. Capsule 6-7 x 3.5-5 mm, ovoid, shorter than sepals, enclosed by petals twisted together. Seeds purplish brown, 0.6-1 mm long; testa finely scalariform.