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CCDB → Angiosperms → Cannabaceae → Humulus
| Taxon name | Status | Median (n) |
| Humulus lupulus L. | Accepted | 10 |
| Humulus scandens (Lour.) Merr. | Accepted | 8 |
| Humulus cordifolius Miq. | Synonym of Humulus lupulus L. | 10 |
| Humulus americanus Nutt. | Synonym of Humulus lupulus var. lupuloides E. Small | 10 |
| Humulus japonicus Siebold & Zucc. | Synonym of Humulus scandens (Lour.) Merr. | 8 |
| Humulus japonicus Siebold & Zucc. | Synonym of Humulus scandens (Lour.) Merr. | 8 |