1. Distance at which a given standard object can be seen with the unaided eye

Type of: visibility, visibleness

• genus Hermannia
• genus Hermissenda
• genus Hernaria
• genus Herpestes
• genus Herrerasaurus
• genus Hesperiphona
• genus Hesperis
• genus Heteranthera
• genus Heterocephalus
• genus Heterodon
• genus Heteromeles
• genus Heteroscelus
• genus Heterotheca
• genus Heuchera
• genus Hevea
• genus Hexagrammos
• genus Hexalectris
• genus Hexamita
• genus Hexanchus
• genus Hibbertia
• genus Hibiscus
• genus Hieracium
• genus Himantoglossum
• genus Himantopus
• genus Hippeastrum