Viola taxonomy

• Kingdom: Plantae
• Superkingdom: Tracheobionta
• Superdivision: Spermatophyta
• Division: Magnoliophyta
• Class: Magnoliopsida
• Subclass: Dilleniidae
• Order: Violales
• Family: Violaceae
• Genus: Viola

Species

• V. adunca (hookedspur violet)
• V. affinis (sand violet)
• V. appalachiensis (Appalachian violet)
• V. arvensis (European field pansy)
• V. aurea (golden violet)
• V. bakeri (Baker's violet)
• V. beckwithii (Beckwith's violet)
• V. ×bernardii
• V. bicolor (field pansy)
• V. biflora (arctic yellow violet)
• V. ×bissellii
• V. blanda (sweet white violet)
• V. ×brauniae
• V. brittoniana (northern coastal violet)
• V. californica (California violet)
• V. canadensis (Canadian white violet)
• V. canina (dog violet)
• V. ×champlainensis
• V. charlestonensis (Charleston Mountain violet)
• V. clauseniana (Clausen's violet)
• V. ×conjugens
• V. ×consobrina
• V. ×consocia
• V. ×cooperrideri
• V. ×cordifolia
• V. cucullata (marsh blue violet)
• V. cuneata (wedgeleaf violet)
• V. ×davisii
• V. ×dissita
• V. douglasii (Douglas' golden violet)
• V. ×eamesii
• V. ×eclipes
• V. egglestonii (glade violet)
• V. epipsila (dwarf marsh violet)
• V. ×esculenta (salad violet)
• V. ×filicetorum
• V. flettii (Olympic violet)
• V. frank-smithii (Frank-Smith's violet)
• V. glabella (pioneer violet)
• V. ×greenmanii
• V. guadalupensis (Guadalupe violet)
• V. hallii (Oregon violet)
• V. hastata (halberdleaf yellow violet)
• V. helenae (Wahiawa stream violet)
• V. hirsutula (southern woodland violet)
• V. ×hollickii
• V. howellii (Howell's violet)
• V. ×insessa
• V. ×insolita
• V. kauaensis (pohe hiwa)
• V. labradorica (alpine violet)
• V. lanaiensis (Hawai'i violet)
• V. lanceolata (bog white violet)
• V. langloisii (Langlois' violet)
• V. langsdorffii (Aleutian violet)
• V. lithion (rock violet)
• V. lobata (pine violet)
• V. ×lovelliana (Lovell's violet)
• V. ×luciae
• V. macloskeyi (small white violet)
• V. ×malteana
• V. maviensis (Hawai'i bog violet)
• V. ×melissifolia
• V. mirabilis (wonder violet)
• V. missouriensis (Missouri violet)
• V. ×mistura
• V. ×modesta
• V. ×mollicula
• V. ×mulfordiae
• V. ×napae
• V. nephrophylla (northern bog violet)
• V. ×notabilis
• V. novae-angliae (New England blue violet)
• V. nuttallii (Nuttall's violet)
• V. oahuensis (Oahu violet)
• V. ocellata (pinto violet)
• V. odorata (sweet violet)
• V. orbiculata (darkwoods violet)
• V. ×palmata (early blue violet)
• V. palustris (marsh violet)
• V. patrinii (China violet)
• V. pedata (birdfoot violet)
• V. pedatifida (prairie violet)
• V. pedunculata (Johnny-jump-up)
• V. pinetorum (goosefoot yellow violet)
• V. ×populifolia (Peck's violet)
• V. ×porteriana
• V. praemorsa (canary violet)
• V. ×primulifolia
• V. psychodes (butterfly violet)
• V. pubescens (downy yellow violet)
• V. purpurea (goosefoot violet)
• V. ×ravida
• V. ×redacta
• V. renifolia (white violet)
• V. ×robinsoniana
• V. rostrata (longspur violet)
• V. rotundifolia (roundleaf yellow violet)
• V. ×ryoniae
• V. sagittata (arrowleaf violet)
• V. selkirkii(Selkirk's violet)
• V. sempervirens (evergreen violet)
• V. septemloba (southern coastal violet)
• V. septentrionalis (northern woodland violet)
• V. sheltonii (Shelton's violet)
• V. ×slavinii
• V. sororia (common blue violet)
• V. striata (striped cream violet)
• V. ×subaffinis
• V. sublanceolata (lanceleaf violet)
• V. tomentosa (feltleaf violet)
• V. tricolor (johnny jumpup)
• V. triloba (three-lobe violet)
• V. trinervata (Rainier violet)
• V. tripartita (threepart violet)
• V. umbraticola (Ponderosa violet)
• V. utahensis (Utah violet)
• V. vallicola (sagebrush violet)
• V. ×viarum (twoflower violet)
• V. villosa (Carolina violet)
• V. wailenalenae (Alakai Swamp violet)
• V. walteri (prostrate blue violet)
• V. ×wittrockiana
• V. ×wujekii

Reference

• Classification for Kingdom Plantae Down to Genus Viola by the U.S. Department of Agriculture