Fallopia convolvulus (L.) Á.Löve

Annual, climbing, convolvulus-like herb, glabrous or finely puberulent, with slender twining stems and slender taproot. Petiole very slender, to 6 cm long. Lamina (1)–2–9 × (0.5)–1–6 cm, ± ovate-sagittate, entire; base shallowly to deeply cordate; apex acute, cuspidate or acuminate. Ochreae to c. 5 mm long, obliquely truncate, soon lacerate. Fls in terminal or axillary racemes with a slender, puberulent peduncle or in fascicles, often in axils of all but the basal lvs, ± pale green, scentless. Bracts generally = or > pedicels, membranous except for green keel. Pedicels short at anthesis, 1.5–3–(5) mm long at fruiting, articulate above middle, winged in upper part. Perianth 1–3 mm long, broad-ovate to broad-elliptic, moderately accrescent, the 3 outer segments with acute green keel and often white margins. Stamens not enclosed in perianth segments; filaments glabrous. Valves of fr. 4–6 mm long, glabrous or finely puberulent, the outer with prominent greenish white margin. Nut 3–4 mm long, black, finely granular; ribs obtuse.

[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]

Flowering: Nov.–Apr.