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Below is a list of plant families, and a list of genera within each family in California.
Click on family name to search for species in that family, or click on genus name to search for species in that genus. | ||||
| Haloragaceae | Haloragis | Myriophyllum | ||
| Halymeniaceae | Grateloupia | |||
| Hamamelidaceae | Hamamelis | Liquidambar | ||
| Hedwigiaceae | Hedwigia | Pseudobraunia | ||
| Heliotropiaceae | Heliotropium | |||
| Helodiaceae | Elodium | Helodium | ||
| Hookeriaceae | Hookeria | |||
| Hydrangeaceae |
Carpenteria Fendlerella |
Jamesia Philadelphus |
Whipplea |
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| Hydrocharitaceae |
Egeria Elodea Hydrilla |
Hydrocharis Limnobium Najas |
Ottelia Vallisneria |
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| Hydrophyllaceae |
Draperia Emmenanthe Eucrypta Hesperochiron |
Howellanthus Hydrophyllum Nemophila Phacelia |
Pholistoma Romanzoffia Tricardia |
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| Hygrobiellaceae | Hygrobiella | |||
| Hylocomiaceae |
Hylocomiadelphus Hylocomium |
Rhytidiadelphus Rhytidiopsis |
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| Hypericaceae | Hypericum | |||
| Hypnaceae |
Buckiella Dacryophyllum Herzogiella |
Homomallium Pseudotaxiphyllum Stereodon |
Straminergon Vesicularia |
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