Shrubs, 1.5-2 m tall, spreading to 2.5 m wide; branches arching to spreading. Stems 4-angled but not ancipitous when young, soon terete; internodes 1-5 cm, shorter than leaves. Leaves with petiole 1-2.5 mm; blade elliptic-oblong to ovate-lanceolate or oblong-lanceolate, (2-)2.5-8.5 × 1-3.5 cm, thickly papery, abaxially paler but not glaucous; laminar glands dots and short streaks; adaxial glands absent or rarely sparse; main lateral veins 3- or 4(or 5)-paired, without visible tertiary reticulation; base cuneate, apex apiculate or obtuse to rounded. Inflorescence 1-3(-5)-flowered, from apical node, flat-topped; bracts lanceolate, persistent. Pedicels 2-10 mm. Flowers (3-)5-6.5 cm in diam., shallowly cupped; buds ovoid, apex obtuse. Sepals erect, subequal, ovate to oblong-ovate or oblong-spatulate, 7-10 × 4.5-6.2 mm; laminar glands lines, sometimes interrupted; margin entire or minutely denticulate and sometimes with narrowly hyaline margin, apex acute or apiculate to obtuse. Petals golden yellow, broadly obovate to subcircular, (2-)2.5-3.2 × (1.2-)1.5-3.2 cm, 3-4 × as long as sepals, eglandular, margin entire or eroded-denticulate, apiculus rounded. Stamen fascicles each with 40-45 stamens, longest 1.2-1.5 cm, ca. 2/5 as long as petals. Ovary ovoid, 5-7 × 3-5 mm; styles 4.5-5(-7) mm, 0.7-0.8(-1) × as long as ovary, free, suberect, outcurved near apex. Capsule ovoid to cylindric-ovoid, ca. 2 × 1-1.2 cm. Seeds dark reddish brown, 1-1.2 mm, not or scarcely carinate; testa linear-foveolate. Fl. Apr-Jul, fr. Oct.