1. Oat of southern Europe and southwestern Asia
   - slender wild oat

Type of: oat

• genus Hackelia
• genus Haemanthus
• genus Haematobia
• genus Haematopus
• genus Haematoxylon
• genus Haematoxylum
• genus Haemodorum
• genus Haemopis
• genus Haemoproteus
• genus Haemulon
• genus Hakea
• genus Halcyon
• genus Haldea
• genus Halenia
• genus Halesia
• genus Haliaeetus
• genus Halicoeres
• genus Halimodendron
• genus Haliotis
• genus Halocarpus
• genus Halogeton
• genus Hamamelidanthum
• genus Hamamelidoxylon
• genus Hamamelis
• genus Hamamelites