Ranunculus flammula L.

Perennial, glabrous or with sparse appressed hairs; roots all fibrous. Stems slender to stout, erect or suberect, (15)–30–60 cm tall. Lvs simple, entire to shallowly serrate or dentate. Basal lvs lanceolate to ovate, acute, abruptly cuneate or truncate at base, 2–8 × 1–3 cm; petioles erect, 5–10 cm long. Cauline lvs becoming smaller, linear to lanceolate, cuneate at base, shortly petiolate to subsessile. Fls (1)–3–10–(25) per stem, 10–15 mm diam. Pedicels erect, sulcate, (2)–3–6 cm long. Sepals 5, sparsely covered in appressed hairs, weakly recurved, obtuse, 2–3.5 mm long. Petals 5, yellow, obovate-cuneate, truncate, 5–8 × 3.5–6 mm; nectary single, c. 1 mm from petal base, covered by a broad obtuse scale. Receptacle glabrous. Achenes 25–40, glabrous, hardly flattened, weakly bordered, ovoid, smooth; body 1.5–2 × c. 1 mm; beak c. 0.1 mm long.

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

Flowering: Oct.–Mar.–(Jun.); Fruiting: Oct.–Mar.–(Jun.)