1. Produced by or producing fever
   - pyrogenous, pyrogenetic 
2. Produced under conditions involving intense heat
   "pyrogenic strata"
   - igneous, pyrogenous

See also: heat, pyrogen

• genus Liquidambar
• genus Liriodendron
• genus Liriope
• genus Listera
• genus Listeria
• genus Litchi
• genus Lithocarpus
• genus Lithophragma
• genus Lithops
• genus Lithospermum
• genus Litocranius
• genus Littorina
• genus Livistona
• genus Loasa
• genus Lobelia
• genus Lobipes
• genus Lobotes
• genus Lobularia
• genus Locusta
• genus Lofortyx
• genus Logania
• genus Loiseleuria
• genus Loligo
• genus Lolium
• genus Lomatia