- = Ranunculus longipetiolatus Colenso, Trans. & Proc. New Zealand Inst. 25: 325 (1892 [1893])
Perennial; rosettes tufted on long creeping stems. Basal lvs on stout erect petioles (7)–15–30–(40) cm long, arising from somewhat bulbous nodes; lamina ternate, glabrous, (1.5)–2–4 cm wide; leaflets sessile or shortly stalked, cuneiform, shallowly 3-fid, crenate or bluntly dentate at tips; lateral leaflets longer than terminal; cauline lvs few, similar to basal but smaller. Fls (1)–3–5 per stem, 10–15 mm diam.; pedicels glabrous. Sepals spreading or weakly recurved, glabrous. Petals 5–7, yellow, narrowly oblong, shortly clawed; nectary single, 1–1.5 mm from petal base, with a short semilunar scale. Receptacle with a basal collar of bristles. Achenes 15–50, hardly flattened, glabrous; body 1.5–2 mm long, slightly rugulose; beak straight, 1–1.5 mm long.
[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]