| Gaillardia amblyodon J. Gay | | a | | Gaillardia amblyodonJ. Gay | |
| Gaillardia aristata Pursh | | a | | Gaillardia aristataPursh | |
| Gaillardia pulchella Foug. | | a | | Gaillardia pulchellaFoug. | |
| Gaillardia pulchella Foug. var. picta (Sweet) A. Gray | | a | i | Gaillardia pulchellaFoug. var.picta (Sweet) A. Gray | |
| Gaillardia spp. | | a | | Gaillardia spp. | |
| Gaillardia ×grandiflora hort. ex Van Houtte | | a | | Gaillardia grandiflorahort. ex Van Houtte | |
| Gaillardia spathulata A. Gray | | a | | Gaillardia spathulataA. Gray | |
| Gaillardia aestivalis (Walter) H. Rock | | a | | Gaillardia aestivalis(Walter) H. Rock | |
| Gaillardia aestivalis (Walter) H. Rock var. flavovirens (C. Mohr) Cronquist | | a | i | Gaillardia aestivalis(Walter) H. Rock var.flavovirens (C. Mohr) Cronquist | |
| Gaillardia lanceolata Michx. var. flavovirens C. Mohr | Gaillardia aestivalis (Walter) H. Rock var. flavovirens (C. Mohr) Cronquist | | i | Gaillardia lanceolataMichx. var.flavovirens C. Mohr | Gaillardia aestivalis(Walter) H. Rock var.flavovirens (C. Mohr) Cronquist |
| Gaillardia aestivalis (Walter) H. Rock var. winkleri (Cory) B. L. Turner | | a | i | Gaillardia aestivalis(Walter) H. Rock var.winkleri (Cory) B. L. Turner | |
| Gaillardia lutea Greene var. winkleri Cory | Gaillardia aestivalis (Walter) H. Rock var. winkleri (Cory) B. L. Turner | | i | Gaillardia luteaGreene var.winkleri Cory | Gaillardia aestivalis(Walter) H. Rock var.winkleri (Cory) B. L. Turner |
| Gaillardia aestivalis (Walter) H. Rock var. aestivalis | | a | i | Gaillardia aestivalis(Walter) H. Rock var.aestivalis | |
| Gaillardia parryi Greene | | a | | Gaillardia parryiGreene | |
| Gaillardia amara Raf. | Helenium amarum (Raf.) H. Rock var. amarum | | | Gaillardia amaraRaf. | Helenium amarum(Raf.) H. Rock var.amarum |
| Gaillardia acaulis Pursh | Tetraneuris acaulis (Pursh) Greene var. acaulis | | | Gaillardia acaulisPursh | Tetraneuris acaulis(Pursh) Greene var.acaulis |
| Gaillardia megapotamica (Spreng.) Baker | | a | | Gaillardia megapotamica(Spreng.) Baker | |
| Gaillardia pinnatifida Torr. | | a | | Gaillardia pinnatifidaTorr. | |
| Gaillardia multiceps Greene | | a | | Gaillardia multicepsGreene | |
| Gaillardia suavis (A. Gray & Engelm.) Britton & Rusby | | a | | Gaillardia suavis(A. Gray & Engelm.) Britton & Rusby | |