Plant Family: Gisekiaceae – Genus Gisekia

Plant Family: Ginkgoaceae – Ginkgo Biloba Tree in Genus Ginkgo

Plant Family: 9 Genera in Hydrangeaceae

Plant Family: Hydatellaceae – Genus Trithuria

Plant Family: 8 Genera in Humiriaceae

Plant Family: 2 Genera in Huaceae

Plant Family: Himantandraceae – Genus Galbulimima

Plant Family: 4 Genera in Hernandiaceae

Plant Family: Helwingiaceae – Genus Helwingia

Plant Family: Heliconiaceae – 203 Species in Genus Heliconia

Plant Family: Hanguanaceae – Genus Hanguana

Plant Family: 26 Genera in Hamamelidaceae

Plant Family: Halophytaceae – Genus Halophytum

Plant Family: 15 Genera in Haemodoraceae

Plant Family: 5 Genera in Gyrostemonaceae

Plant Family: 9 Genera in Juglandaceae

Plant Family: Joinvilleaceae – Genus Joinvillea

Plant Family: 4 Genera in Ixonanthaceae

Plant Family: Ixioliriaceae – Genus Ixiolirion

Plant Family: 2 Genera in Iteaceae

Plant Family: 4 Genera in Irvingiaceae

Plant Family: 69 Genera in Iridaceae

Plant Family: 23 Genera in Icacinaceae

Plant Family: 5 Genera in Hypoxidaceae