Scrambling or ascending perennial herb or subshrub 30–60 cm high; stems slender, to c. 2 m long, sometimes climbing over taller plants. Leaves 15–45 mm long, green; leaflets articulate at base or continuous with petiole, oblong-elliptic to elliptic, 10–30 mm long, (3–)4–12 mm wide, fleshy, apex rounded or truncate; common petiole narrow. Sepals 4, ovate-lanceolate, 5–9 mm long, deflexed or spreading in fruit; petals 4, obovate-cuneate, 8–15 mm long, apex rounded to emarginate, bright yellow; stamens 8, filaments subulate, lacking wings. Fruiting pedicels 5–15 mm long; fruit a 4-angled loculicidal capsule, obconical, 10–12 mm long, drooping, abruptly truncate at apex with a short, blunt appendage at the upper corner of each angle and a persistent style; seeds 1 or 2 per cell. Flowers mostly Jun.–Dec.