Science magazines
- Hawksbill Sea Turtle
- Hay's Spring Amphipod
- Hayun Lagu
- Heau
- Heavy Pigtoe
- Hedyotis Degeneri
- Hedyotis Parvula
- Heliotrope Milk-vetch
- Heller's Blazing Star
- Hesperomannia Arborescens
- Hesperomannia Arbuscula
- Hesperomannia Lydgatei
- Hickman's Potentilla
- Hidden Lake Bluecurls
- Higgins Eye Pearlymussel
- Highlands Scrub Hypericum
- Higo Chumbo
- Higuero de Sierra
- Hilo Ischaemum
- Hinckley Oak