Cymes relatively few-flowered, axillary, up to 3 cm. in diam.; peduncle up to 3 cm. long; pedicels 3–4 mm. long; bracts and bracteoles 0–5–2 mm. long, ovate.
Erect completely glabrous herb up to 40 cm. tall; stem often unbranched, zigzag, deeply sulcate or winged; tendrils absent.
Ovary 0–5 mm. long; style 1 mm. long; stigma slightly capitate.
Calyx up to 1 mm. long, subentire.
Flower-bud 2·5 × 1·5 mm., conical.
Seed 1, 5 × 4 mm., ± smooth.
Fruit 9 × 8 mm., globose.
Petals reddish-green.