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