- Horkelia clevelandii
- Horkelia clevelandii (Greene) Rydb.
- Horkelia cuneata
- Horkelia cuneata Lindl. subsp. cuneata
- Horkelia daucifolia
- Horkelia daucifolia (Greene) Rydb.
- Horkelia fusca
- Horkelia fusca Lindl. subsp. parviflora (Nutt. ex Hook. & Arn.) D. D. Keck
- Horkelia fusca Lindl.
- Horkelia hendersonii
- Horkelia hendersonii Howell
- Horkelia sericata
- Horkelia sericata S.Watson
- Horkelia sericata S. Watson
- Horkelia sp.