- Ceratocephala testiculata, Ceratocephala falcata;Curveseed butterwort;Bur Buttercup;Ranunculus testiculatus;Curveseed Butterwort;Ceratocephala falcata auct non (L) Pers;Ceratocephala orthoceras Dc;Ranunculus falcatus auct non L;Ranunculus testiculatus Crantz
- Hibbertia hypericoides, Yellow Buttercups;Pleurandra hypericoides Dc
- Kumlienia hystricula, Waterfall false buttercup;Ranunculus hystriculus
- Oxalis pes-caprae, Soursob;Sour-sob;Variable Wood-sorrel;African Wood-sorrel;Cape Cow-slip;Oxalis;Yellow-flowered Oxalis;Soursop;Bemuda Buttercup;Oxalis cernua Thunb;Bermuda-buttercup;Bermuda buttercup
- Ranunculus abortivus, Littleleaf buttercup
- Ranunculus aconitifolius, Aconite-leaved Buttercup
- Ranunculus acriformis, Sharpleaf buttercup
- Ranunculus acris, Meadow Buttercup;Tall buttercup
- Ranunculus adoneus, Alpine buttercup
- Ranunculus alismifolius, Plantainleaf buttercup
- Ranunculus allegheniensis, Allegheny Mountain buttercup
- Ranunculus allenii, Allens buttercup
- Ranunculus amphitrichus, Small River Buttercup;Ranunculus rivularis Banks & Sol ex Dc;Ranunculus rivularis var subfluitans Benth;Ranunculus rivularis Banks & Sol ex Dc var rivularis
- Ranunculus andersonii, Andersons buttercup
- Ranunculus arizonicus, Arizona buttercup
- Ranunculus arvensis, Corn Buttercup
- Ranunculus auricomus, Goldilocks Buttercup;Greenland buttercup
- Ranunculus bulbosus, Bulbous Buttercup;Ranunculus bulbosus subsp bulbifer (Jord) P Fourn;St Anthonys turnip
- Ranunculus californicus, California buttercup
- Ranunculus canus, Sacramento Valley buttercup
- Ranunculus cardiophyllus, Heartleaf buttercup
- Ranunculus collinus, Strawberry Buttercup;Ranunculus inconspicuus Hookf;Ranunculus rivularis var inconspicuus Hookf Rodway;Ranunculus rivularis var inconspicuous orth var Rodway sensu Rodway, L 1903;Ranunculus rivularis var inconspicuus Hookf Benth
- Ranunculus colonorum, Common Buttercup;Ranunculus discolor Steud;Ranunculus lappaceus var macrocarpellus Domin;Ranunculus lappaceus var normalis Domin
- Ranunculus cymbalaria, Alkali buttercup
- Ranunculus eastwoodianus, Eastwoods buttercup
- Ranunculus eschscholtzii, Eschscholtzs buttercup
- Ranunculus fascicularis, Early buttercup
- Ranunculus ficaria, Lesser Celandine;Ficaria verna Huds;Fig buttercup;Lesser celandine;Ficaria verna
- Ranunculus flabellaris, Yellow water buttercup
- Ranunculus glaberrimus, Sagebrush buttercup
- Ranunculus glabrifolius, Shining Buttercup;Ranunculus incisus Hookf;Ranunculus rivularis var major Benth
- Ranunculus glacialis, Glacier buttercup
- Ranunculus gmelinii, Gmelins buttercup
- Ranunculus gormanii, Gormans buttercup
- Ranunculus harveyi, Harveys buttercup
- Ranunculus hawaiensis, Hawaiian buttercup
- Ranunculus hebecarpus, Delicate buttercup
- Ranunculus hederaceus, Ivy-leaved Crowfoot;Ivy buttercup
- Ranunculus hispidus, Bristly buttercup
- Ranunculus hydrocharoides, Frogbit buttercup
- Ranunculus hyperboreus, High northern buttercup
- Ranunculus inamoenus, Graceful buttercup
- Ranunculus inundatus, River Buttercup;Ranunculus rivularis var inundatus RBr ex Dc Rodway
- Ranunculus jovis, Utah buttercup
| - Ranunculus lappaceus, Common Buttercup;Australian Buttercup
- Ranunculus lapponicus, Lapland buttercup
- Ranunculus laxicaulis, Mississippi buttercup
- Ranunculus lobbii, Lobbs buttercup
- Ranunculus longirostris, Fan-leaved Water-crowfoot;Ranunculus circinatus;Ranunculus aquatilis auct, non L;Longbeak buttercup;Longbeak Buttercup;Batrachium circinatum (Sibth) Rchb;Batrachium longirostre (Godr) FW Schultz;Ranunculus amphibius James;Ranunculus circinatus auct non Sibth;Ranunculus subrigidus W Drew;Ranunculus usneoides Greene
- Ranunculus macauleyi, Rocky Mountain buttercup
- Ranunculus macounii, Macouns buttercup
- Ranunculus macranthus, Large buttercup
- Ranunculus marginatus, St Martins Buttercup;Ranunculus marginatus subsp trachycarpus (Fisch & CA Mey) Hayek;Ranunculus marginatus var trachycarpus (Fisch & CA Mey) Azn;Margined buttercup
- Ranunculus mauiensis, Maui buttercup
- Ranunculus micranthus, Rock buttercup
- Ranunculus muelleri, Felted Buttercup
- Ranunculus muricatus, Rough-fruited Buttercup;Spinyfruit buttercup
- Ranunculus nivalis, Snow buttercup
- Ranunculus occidentalis, Western buttercup
- Ranunculus oreogenes, Oregon buttercup
- Ranunculus oresterus, Blue Mountain buttercup
- Ranunculus orthorhynchus, Straightbeak buttercup
- Ranunculus pacificus, Pacific buttercup
- Ranunculus pallasii, Pallas buttercup
- Ranunculus paludosus, Jersey Buttercup
- Ranunculus parviflorus, Small-flowered Buttercup;Smallflower buttercup;Smallflower Buttercup
- Ranunculus pedatifidus, Surefoot buttercup;Lie ye mao gen
- Ranunculus pensylvanicus, Bristly Buttercup;Pennsylvania buttercup
- Ranunculus pimpinellifolius, Bog Buttercup;Ranunculus lappaceus var pimpinellifolius Hook Benth;Ranunculus hirtus var vestitus Hookf
- Ranunculus platensis, Prairie Buttercup
- Ranunculus plebeius, Forest Buttercup;Hairy Buttercup;Ranunculus lappaceus var pseudoplebejus Domin;Common Australian buttercup
- Ranunculus populago, Popular buttercup
- Ranunculus pumilio, Ferny Small-flowered Buttercup;Smallflower Buttercup;Ferny Small-flower Buttercup;Ranunculus leptocaulis Hook
- Ranunculus pygmaeus, Pygmy buttercup
- Ranunculus ranunculinus, Tadpole buttercup
- Ranunculus repens, Creeping Buttercup;Creeping buttercup
- Ranunculus rhomboideus, Labrador buttercup
- Ranunculus sabinei, Sabine buttercup
- Ranunculus sardous, Pale Hairy Buttercup;Ranunculus angulatus CPresl;Ranunculus philonotis Retz;Hairy buttercup
- Ranunculus sceleratus, Celery-leaved Buttercup;Cursed buttercup
- Ranunculus sessiliflorus, Smallflower Buttercup;Annual Buttercup;Ranunculus parviflorus var australis Benth
- Ranunculus sulphureus, Sulphur buttercup
- Ranunculus trichophyllus, Water Buttercup;Batrachium trichophyllum Chaix Bosch;Batrachium trichophyllum Chaix Des Moul;Thread-leaved Water-crowfoot;Ranunculus drouetii FW Schultz;Ranunculus trichophyllus subsp drouetii (FW Schultz) AR Clapham;Threadleaf crowfoot
- Ranunculus trilobus, Threelobe buttercup
- Ranunculus turneri, Turners buttercup
- Ranunculus uncinatus, Woodland buttercup
- Ranunculus verecundus, Wetslope buttercup
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