Volume IV (1988) - Flora of New Zealand Naturalised Pteridophytes, Gymnosperms, Dicotyledons
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Ranunculus ophioglossifolius Vill.

*R. ophioglossifolius Villars, Hist. Pl. Dauph.  3(2):   731  (1789)

Perennial, usually with appressed hairs; roots all fibrous. Stems slender, erect, (15)-30-45 cm tall. Lvs simple, shallowly serrate. Basal lvs ovate, acute, cordate at base, 2-8 × 1-3 cm; petioles erect, 5-10 cm long. Cauline lvs smaller than basal, becoming lanceolate, cuneate at base, shortly petiolate. Fls (10)-20-numerous per stem, 7-10 mm diam. Pedicels erect, sulcate, (2)-3-6 cm long. Sepals 5, with appressed hairs, weakly recurved, obtuse, 2-3.5 mm long. Petals 5, yellow, obovate-cuneate, truncate, 2.5-4.5 mm long; nectary single, c. 1 mm from petal base, covered by a broad, triangular or retuse scale. Receptacle glabrous. Achenes 25-40, glabrous, hardly flattened, bordered, ovoid, tuberculate on faces; body 1.5-2 × c. 1 mm; beak c. 0.1 mm long.

N.: Waikato (Te Kuiti and Kawhia).

S. Europe, S.W. Asia, N. Africa 1957

Swampy land, ditches.

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