1. German naturalist whose speculations that plants and animals are made up of tiny living 'infusoria' led to the cell theory (1779-1851)
   - Oken, Lorenz Oken, Okenfuss

Type of: natural scientist, naturalist

• genus Jamesonia
• genus Jasminum
• genus Jatropha
• genus Javanthropus
• genus Jordanella
• genus Juglans
• genus Junco
• genus Juncus
• genus Juniperus
• genus Jynx
• genus Kakatoe
• genus Kalmia
• genus Kalotermes
• genus Katsuwonus
• genus Kennedia
• genus Kennedya
• genus Kenyapithecus
• genus Keteleeria
• genus Khaya
• genus Kiggelaria
• genus Kinosternon
• genus Kirkia
• genus Klebsiella
• genus Knightia
• genus Kniphofia