All Species in Ptelea
- California Hoptree (Ptelea crenulata)
- Common Hoptree (Ptelea trifoliata)
- Ptelea aptera (Ptelea aptera)
- Ptelea trifoliata subsp. angustifolia (Ptelea trifoliata subsp. angustifolia)
- Ptelea trifoliata subsp. coahuilensis (Ptelea trifoliata subsp. coahuilensis)
- Ptelea trifoliata subsp. pallida (Ptelea trifoliata subsp. pallida)
- Ptelea trifoliata subsp. polyadenia (Ptelea trifoliata subsp. polyadenia)
- Ptelea trifoliata subsp. trifoliata (Ptelea trifoliata subsp. trifoliata)
- Ptelea trifoliata var. pumila (Ptelea trifoliata var. pumila)