Ranunculus sect. Batrachium, de Candolle, 1818

Wiegleb, Gerhard, Desfayes, Michel & Bobrov, Alexander A., 2022, Ranunculus oblitus (section Batrachium, Ranunculaceae), a new species from South America, Phytotaxa 559 (2), pp. 132-144 : 142

Key to Ranunculus sect. Batrachium in South America

1 Laminar leaves present, mostly with 5‒7 acute lobes, intermediate leaves often present, shoot up to 20 cm long, capillary leaves up to 30 mm long, with 20‒30 terminal segments, sepals 1‒2 mm long, petals spathulate to elliptical, not contiguous, nectar pits circular or elongate, carpels 10‒20 carpels 10‒20, achenes 1.5‒1.8 mm long, style caducous........................................... R. oblitus

1* Laminar leaves absent, intermediate leaves absent, shoot up to 100 cm long, capillary leaves up to 30 mm long, with up to 80 terminal segments, sepals 2–4 mm long, petals obovoid, 7‒10 mm long, contiguous, nectar pits pyriform, carpels 16‒50, achenes 1.5‒1.7 mm long, style persistent................................................................................................................ R. sp. ( R. cf. subrigidus )