- Ranunculus abortivus, Littleleaf buttercup
- Ranunculus acaulis
- Ranunculus aconitifolius, Aconite-leaved Buttercup
- Ranunculus acriformis, Sharpleaf buttercup
- Ranunculus acris, Meadow Buttercup
- Ranunculus acrophilus
- Ranunculus adoneus, Alpine buttercup
- Ranunculus affinis
- Ranunculus alismifolius, Plantainleaf buttercup
- Ranunculus allegheniensis, Allegheny Mountain buttercup
- Ranunculus allenii, Allens buttercup
- Ranunculus alveolatus
- Ranunculus ambigens, Waterplantain spearwort
- Ranunculus amphitrichus, Small River Buttercup
- Ranunculus amplus
- Ranunculus andersonii, Andersons buttercup
- Ranunculus anemoneus
- Ranunculus aquatilis, Common Water-crowfoot
- Ranunculus arizonicus, Arizona buttercup
- Ranunculus arvensis, Corn Buttercup
- Ranunculus auricomus, Goldilocks Buttercup
- Ranunculus austro-oreganus
- Ranunculus bloomeri
- Ranunculus bongardii
- Ranunculus bulbosus, Bulbous Buttercup
- Ranunculus californicus, California buttercup
- Ranunculus cantoniensis
- Ranunculus canus, Sacramento Valley buttercup
- Ranunculus cardiophyllus, Heartleaf buttercup
- Ranunculus carolinianus, Buttercup
- Ranunculus cheirophyllus
- Ranunculus clivicola
- Ranunculus collicola
- Ranunculus collinus, Strawberry Buttercup
- Ranunculus colonorum, Common Buttercup
- Ranunculus confervoides
- Ranunculus cordiger
- Ranunculus crassipes
- Ranunculus crassirostratus
- Ranunculus cymbalaria, Alkali buttercup
- Ranunculus decurvus
- Ranunculus delphinifolius
- Ranunculus diminutus
- Ranunculus dissectifolius
- Ranunculus eastwoodianus, Eastwoods buttercup
- Ranunculus eichlerianus
- Ranunculus eschscholtzii, Eschscholtzs buttercup
- Ranunculus fascicularis, Early buttercup
- Ranunculus ficaria, Lesser Celandine
- Ranunculus flabellaris, Yellow water buttercup
- Ranunculus flagelliformis
- Ranunculus flammula, Lesser Spearwort
- Ranunculus fluitans, River Water-crowfoot
- Ranunculus formosa-montanus
- Ranunculus geranioides
- Ranunculus glaberrimus, Sagebrush buttercup
| - Ranunculus glabrifolius, Shining Buttercup
- Ranunculus glacialis, Glacier buttercup
- Ranunculus gmelinii, Gmelins buttercup
- Ranunculus gormanii, Gormans buttercup
- Ranunculus grandis, Da mao gen
- Ranunculus graniticola
- Ranunculus gunnianus
- Ranunculus hamatosetosus
- Ranunculus harveyi, Harveys buttercup
- Ranunculus hawaiensis, Hawaiian buttercup
- Ranunculus hebecarpus, Delicate buttercup
- Ranunculus hederaceus, Ivy-leaved Crowfoot
- Ranunculus hexasepalus
- Ranunculus hispidus, Bristly buttercup
- Ranunculus hydrocharoides, Frogbit buttercup
- Ranunculus hyperboreus, High northern buttercup
- Ranunculus inamoenus, Graceful buttercup
- Ranunculus inundatus, River Buttercup
- Ranunculus japonicus
- Ranunculus jovis, Utah buttercup
- Ranunculus jugosus
- Ranunculus junipericola
- Ranunculus juniperinus
- Ranunculus kamtschaticus
- Ranunculus lappaceus, Common Buttercup
- Ranunculus lapponicus, Lapland buttercup
- Ranunculus laxicaulis, Mississippi buttercup
- Ranunculus lindheimeri
- Ranunculus lingua, Greater Spearwort
- Ranunculus lobbii, Lobbs buttercup
- Ranunculus longirostris, Fan-leaved Water-crowfoot
- Ranunculus macauleyi, Rocky Mountain buttercup
- Ranunculus macounii, Macouns buttercup
- Ranunculus macranthus, Large buttercup
- Ranunculus marginatus, St Martins Buttercup
- Ranunculus mauiensis, Maui buttercup
- Ranunculus meristus
- Ranunculus micranthus, Rock buttercup
- Ranunculus millanii
- Ranunculus monophyllus, Dan ye mao gen
- Ranunculus monspeliacus
- Ranunculus morii
- Ranunculus muelleri, Felted Buttercup
- Ranunculus muricatus, Rough-fruited Buttercup
- Ranunculus nankotaizanus
- Ranunculus nanus
- Ranunculus natans, Fu mao gen
- Ranunculus niphophilus
- Ranunculus nivalis, Snow buttercup
- Ranunculus oblongifolius
- Ranunculus occidentalis, Western buttercup
- Ranunculus omiophyllus, Round-leaved Crowfoot
- Ranunculus ophioglossifolius, Adders-tongue Spearwort
- Ranunculus oreogenes, Oregon buttercup
- Ranunculus oresterus, Blue Mountain buttercup
- Ranunculus orthorhynchus, Straightbeak buttercup
| - Ranunculus pachycarpus
- Ranunculus pacificus, Pacific buttercup
- Ranunculus pallasii, Pallas buttercup
- Ranunculus palmatus
- Ranunculus paludosus, Jersey Buttercup
- Ranunculus papulentus
- Ranunculus parviflorus, Small-flowered Buttercup
- Ranunculus pascuinus
- Ranunculus pedatifidus, Surefoot buttercup
- Ranunculus peltatus, Pond Water-crowfoot
- Ranunculus penicillatus, Stream Water-crowfoot
- Ranunculus pensylvanicus, Bristly Buttercup
- Ranunculus pentandrus
- Ranunculus peruvianus
- Ranunculus pilosus
- Ranunculus pimpinellifolius, Bog Buttercup
- Ranunculus platensis, Prairie Buttercup
- Ranunculus plebeius, Forest Buttercup
- Ranunculus populago, Popular buttercup
- Ranunculus praemorsus
- Ranunculus prasinus
- Ranunculus productus
- Ranunculus pumilio, Ferny Small-flowered Buttercup
- Ranunculus pusillus, Low spearwort
- Ranunculus pygmaeus, Pygmy buttercup
- Ranunculus ranunculinus, Tadpole buttercup
- Ranunculus recurvatus, Blisterwort
- Ranunculus repens, Creeping Buttercup
- Ranunculus reptans, Creeping Spearwort
- Ranunculus rhomboideus, Labrador buttercup
- Ranunculus robertsonii
- Ranunculus rupestris
- Ranunculus sabinei, Sabine buttercup
- Ranunculus sardous, Pale Hairy Buttercup
- Ranunculus scapiger
- Ranunculus sceleratus, Celery-leaved Buttercup
- Ranunculus septentrionalis
- Ranunculus sessiliflorus, Smallflower Buttercup
- Ranunculus setaceus
- Ranunculus sieboldii
- Ranunculus sulphureus, Sulphur buttercup
- Ranunculus taisanensis
- Ranunculus tener
- Ranunculus ternatus
- Ranunculus trichophyllus, Water Buttercup
- Ranunculus trilobus, Threelobe buttercup
- Ranunculus tripartitus, Three-lobed Crowfoot
- Ranunculus triplodontus
- Ranunculus turneri, Turners buttercup
- Ranunculus uncinatus, Woodland buttercup
- Ranunculus undosus
- Ranunculus verecundus, Wetslope buttercup
- Ranunculus victoriensis
- Ranunculus x ligulatus
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