| Haagea |
| Haageocactus |
| Haageocereus |
| Haagespostoa |
| Hamatocactus |
| Hariota |
| Harricereus |
| Harrisia |
| Harrisinopsis |
| Haseltonia |
| Hatiora |
| Heliabravoa |
| Helianthocereus |
| Heliaporus |
| Heliocactus |
| Heliocereopsis |
| Heliocereus |
| Heliochia |
| Helioselenius |
| Heliosocereus |
| Heliphyllum |
| Heptocereus |
| Hertrichocereus |
| Hickenia |
| Hildewintera |
| Hildmannia |
| Homalocephala |
| Horridocactus |
| Hylocereus |
| Hylophyllum |
| Hymenorebutia |