Shrub over 50 cm tall, with branches ± spreading. Stems 4-lined and ancipitous when young, soon terete; internodes 6-35 mm long, shorter than to exceeding leaves; bark grey-brown. Leaves sessile or subsessile; lamina 10-27(-30) x 5-10(-13) mm, oblong to elliptic or obovate, acute to rounded, margin plane, base cuneate to angustate, paler beneath, not glaucous, subcoriaceous, lower ones tardily ? deciduous; venation: 1 pair main laterals (intramarginal), with c. 6 midrib branches, the tertiary reticulum almost invisible; laminar gland dots prominent; intramarginal glands dense. Inflorescence 1-3-flowered, terminal, sometimes with 1-flowered short subsidiary branches from up to 3 nodes below; pedicels c. 10 mm long; bracteoles narrowly elliptic or elliptic-lanceolate, persistent. Flowers 40-60 mm in diam., stellate ?; buds not seen. Sepals 3.5-5(-8) x 0.7-l.2(-2) mm, very slightly connate, scarcely imbricate, equal, spreading ? in flower, spreading or reflexed in fruit, linear-lanceolate to linear, subacute to rounded, 5-veined with veins reticulately branched, midrib indistinct; laminar glands striiform and punctiform; inframarginal glands indistinct or absent. Petals bright yellow, not veined or tinged red, spreading ?, 20-28 x 10-20 mm, c. 3.5-6 x sepals, obovate, with apiculus short. Stamenfascicles each with c. 15 stamens, longest 12-16 mm long, c. 0.6 x petals. Ovary 2.5-3(-5) x c. 1.5 mm, narrowly ovoid-ellipsoid; styles 10.5-12(-15) mm long, c. 4. ovary, slender; stigmatic mass capitate. Capsule 8-12 x 4-6 mm, cylindric-ellipsoid. Seeds dark yellowish-brown, 1.2-1.4 mm long, narrowly cylindric, narrowly carinate, with long apical expansion narrow or sometimes narrowly winged, linear-reticulate.