Helanthium
bolivianum


Hemianthus
micranthemoides


Heteranthera
zosterifolia



Homalomena


Hottonia
inflata






Hydrocleis
aquatica





Hydrostachys
polymorpha

Africa, Madagascar, New Zealand: a rheophtic fleshy fern that lives in whitewater of rives around waterfalls. Grows only in very fast moving water. One or two dozen species, taxonomy is miuddled.




Hygoryza
aristata





Hyptis
lacinita
lorentziana