Hedyotis tenuifolia f. leucantha Standl. form synonym

Hedyotis nigricans var. rigidiuscula (A.Gray) Shinners variety synonym

Hedyotis purpurea var. montana (Small) Fosberg variety synonym

Hedyotis purpurea var. calycosa (A.Gray) Fosberg variety synonym

Hedyotis lanceolata Poir. species synonym

Hedyotis calycosa Shuttlew. ex A.Gray species synonym

Hedyotis purpurea f. albiflora (Standl.) Fosberg form synonym

Hedyotis frankii C.Presl species synonym

Diodia frankii Steud. & Hochst. ex C.Presl species synonym

Hedyotis caroliniana Raeusch. species synonym

Hedyotis purpurea f. leucantha (Standl.) Fosberg form synonym

Oldenlandia purpurea var. ciliolata (Torr. ex Spreng.) A.Gray variety synonym

Hedyotis purpurea f. pubescens (Britton) Fosberg form synonym

Houstonia purpurea var. purpurea variety accepted

Houstonia angustifolia Pursh species heterotypic synonym

Hedyotis ciliolata Torr. ex Spreng. species heterotypic synonym

Houstonia purpurea var. montana (Small) Terrell variety accepted

Houstonia montana Small species synonym

Houstonia purpurea var. calycosa A.Gray variety accepted

Houstonia lanceolata (Poir.) Britton species synonym

Houstonia calycosa (A.Gray) Mohr species synonym

Houstonia pubescens Raf. species synonym

Houstonia rigidiuscula (A.Gray) Wooton & Standl. species synonym

Anotis longifolia G.Don species synonym

Houstonia tenuifolia f. leucantha Standl. form synonym

Anotis lanceolata DC. species synonym

Houstonia lanceolata f. albiflora Standl. form synonym

Houstonia umbellata Walp. species synonym

Houstonia purpurea var. pubescens Britton variety synonym

Houstonia varians Michx. species synonym

Anotis ciliolosa G.Don species synonym

Houstonia macrosepala Nutt. species synonym

Houstonia rupestris Raf. species synonym

Houstonia angustifolia var. rigidiuscula A.Gray variety synonym

Hedyotis umbellata Walter species heterotypic synonym

Houstonia purpurea var. montana Chick. variety synonym

Hedyotis purpurea var. calycosa (A.Gray) C.Mohr variety synonym

Spermacoce lanceolata Frank ex C.Presl species heterotypic synonym

Houstonia purpurea f. pubescens (Britton) Fernald form synonym

Houstonia latifolia Willd. species synonym

Diodia frankii Steud. & Hochst. species homotypic synonym

Hedyotis ciliolata Torr. species homotypic synonym

Spermacoce lanceolata Frank species homotypic synonym

Hedyotis calycosa Shuttlew. species homotypic synonym