Buttercup (Ranunculus) -

• Rock Buttercup (Micranthus)
  
• Maui Buttercup (Mauiensis)
  
• Margined Buttercup (Marginatus)
  Margined Buttercup, Margined Buttercup
• Large Buttercup (Macranthus)
  
• Spinyfruit Buttercup (Muricatus)
  
• Natans (Natans)
  
• Blue Mountain Buttercup (Oresterus)
  
• Oregon Buttercup (Oreogenes)
  
• Western Buttercup (Occidentalis)
  Western Buttercup, Nelson's Buttercup, Western Buttercup
• Snow Buttercup (Nivalis)
  
• Macoun's Buttercup (Macounii)
  
• Rocky Mountain Buttercup (Macauleyi)
  Brandegee's Buttercup, Rocky Mountain Buttercup
• High Northern Buttercup (Hyperboreus)
  
• Greater Creeping Spearwort (Flammula)
  Greater Creeping Spearwort, Greater Creeping Spearwort
• Yellow Water Buttercup (Flabellaris)
  
• Fig Buttercup (Ficaria)
  Fig Buttercup
• Australian Buttercup (Lappaceus)
  
• Lapland Buttercup (Lapponicus)
  
• Longbeak Buttercup (Longirostris)
  
• Lobb's Buttercup (Lobbii)
  
• Mississippi Buttercup (Laxicaulis)
  
• Straightbeak Buttercup (Orthorhynchus)
  Bloomer's Buttercup, Straightbeak Buttercup
• Pacific Buttercup (Pacificus)
  
• Creeping Buttercup (Repens)
  
• Sardinian Buttercup (Sabinei)
  
• Blisterwort (Recurvatus)
  Blisterwort, Blisterwort
• Tadpole Buttercup (Ranunculinus)
  
• Labrador Buttercup (Rhomboideus)
  
• Hairy Buttercup (Sardous)
  
• Turner's Buttercup (Turneri)
  
• Sulphur Buttercup (Sulphureus)
  
• Suksdorf's Buttercup (Suksdorfii)
  
• Cursed Buttercup (Sceleratus)
  Cursed Buttercup, Cursed Buttercup
• Pygmy Buttercup (Pygmaeus)
  Pygmy Buttercup
• Low Spearwort (Pusillus)
  Low Spearwort, Low Spearwort
• Pennsylvania Buttercup (Pensylvanicus)
  
• Surefoot Buttercup (Pedatifidus)
  Northern Buttercup, Surefoot Buttercup
• Smallflower Buttercup (Parviflorus)
  
• Pallas' Buttercup (Pallasii)
  
• Latin American Buttercup (Petiolaris)
  Arsene's Buttercup
• Prairie Buttercup (Platensis)
  
• Fall Buttercup (Aestivalis)
  
• Popular Buttercup (Populago)
  
• Common Australian Buttercup (Plebeius)
  
• Early Buttercup (Fascicularis)
  
• Tundra Buttercup (Eximius)
  
• Threadleaf Crowfoot (Trichophyllus)
  Threadleaf Crowfoot, Threadleaf Crowfoot
• Ice Cold Buttercup (Karelinii)
  
• Kamchatka Buttercup (Kamchaticus)
  
• Utah Buttercup (Jovis)
  
• Threelobe Buttercup (Trilobus)
  
• Obscure Buttercup (Triternatus)
  
• Aconitifolius (Aconitifolius)
  
• Littleleaf Buttercup (Abortivus)
  
• Wetslope Buttercup (Verecundus)
  
• Woodland Buttercup (Uncinatus)
  Earle's Buttercup, Idaho Buttercup, Woodland Buttercup
• Graceful Buttercup (Inamoenus)
  Graceful Buttercup, Graceful Buttercup, Graceful Buttercup
• Frogbit Buttercup (Hydrocharoides)
  Frogbit Buttercup, Frogbit Buttercup
• Gramineus (Gramineus)
  
• Gorman's Buttercup (Gormanii)
  
• Gmelin's Buttercup (Gmelinii)
  
• Glacier Buttercup (Glacialis)
  Glacier Buttercup
• Harvey's Buttercup (Harveyi)
  
• Hawai'ian Buttercup (Hawaiensis)
  
• Bristly Buttercup (Hispidus)
  Bristly Buttercup, Bristly Buttercup, Bristly Buttercup
• Ivy Buttercup (Hederaceus)
  
• Delicate Buttercup (Hebecarpus)
  
• Sharpleaf Buttercup (Acriformis)
  Sharpleaf Buttercup, Mountain Sharp Buttercup
• Tall Buttercup (Acris)
  Showy Buttercup, Tall Buttercup
• Heartleaf Buttercup (Cardiophyllus)
  
• Sacramento Valley Buttercup (Canus)
  
• California Buttercup (Californicus)
  
• St. Anthony's Turnip (Bulbosus)
  
• Colorado Buttercup (Coloradensis)
  
• Cordiger (Cordiger)
  
• Eschscholtz's Buttercup (Eschscholtzii)
  Eschscholtz's Buttercup, Eschscholtz's Buttercup, Threesection Buttercup
• Eastwood's Buttercup (Eastwoodianus)
  
• Alkali Buttercup (Cymbalaria)
  
• Azores Buttercup (Cortusifolius)
  
• Carter's Buttercup (Bonariensis)
  Carter's Buttercup
• Southern Oregon Buttercup (Austrooreganus)
  
• Waterplantain Spearwort (Ambigens)
  
• Allegheny Mountain Buttercup (Allegheniensis)
  
• Plantainleaf Buttercup (Alismifolius)
  Plantainleaf Buttercup, Plantainleaf Buttercup, Davis' Buttercup
• Alpine Buttercup (Adoneus)
  Alpine Buttercup, Alpine Buttercup
• Anderson's Buttercup (Andersonii)
  Anderson's Buttercup, Anderson's Buttercup
• Arizona Buttercup (Arizonicus)
  
• Greenland Buttercup (Auricomus)
  
• Corn Buttercup (Arvensis)
  
• White Water Crowfoot (Aquatilis)
  
• Sagebrush Buttercup (Glaberrimus)
  Elliptical Buttercup, Sagebrush Buttercup