The following species in the flowering plant genus Primula, often called primroses and cowslips, are accepted by Plants of the World Online. Over 25 books have been written on the genus. * Gusmus ex G.C.Churchill * W.W.Sm. * Balf.f. & Forrest * Balf.f. & Purdom * Wendelbo * Balf.f. & Forrest * Banfi & Ferl. * Cholewa & D.M.Hend. * Primula algida Adams * G.Taylor ex W.W.Sm. * Primula allionii Loisel. * Primula alpicola (W.W.Sm.) Stapf * Balf.f. & Farrer * Balf.f. * Primula amethystina Franch. * M.Bieb. * Primula angustifolia Torr. * Balf.f. & Forrest * Balf.f. & Kingdon-Ward * G.Hao, C.M.Hu & Yuan Xu * S.Kelso * Widmer * D.Fang * W.W.Sm. & Forrest * S.K.Basak & Maiti * H.R.Fletcher * H.R.Fletcher * W.W.Sm. * W.W.Sm. & Forrest * Primula a