Glabrous herb, often forming dense stands; stems simple, concolorous, to c. 70 cm high, prostrate and rooting towards base, otherwise erect. Lvs 1- or 3-foliolate, with petiole to c. 5 cm long, usually opposite. Lamina of simple lf and terminal leaflet usually 6-13 × 4-7.5 cm, 1-2 mm thick, elliptic or broad-elliptic, often folded upwards, otherwise with flat surfaces, green, sometimes reddish green where very exposed; margins purple, prominently crenate, lacking plantlets; base truncate or subcordate; apex rounded or obtuse. Infl. a loose, terminal panicle, to c. 20 cm diam.; main axis to c. 25 cm long. Fls pendulous. Calyx 3-4.2 cm long, broadly cylindric, inflated, green or often green beneath and red above; lobes 5-8 mm long, broadly triangular. Corolla deep red; tube c. 2.8-3.5 cm long, included in calyx; lobes 1-1.5 cm long, triangular, eventually well-exserted from calyx, sharply acute. Stamens c. 2.7 cm long, pale green. Styles 2-2.5 cm long, pale green. Follicles c. 1.5 cm long, beaked. Seeds < 1 mm long, narrow, doubtfully fertile.