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Leatherleaf Fern
- widely distributed fern of tropical southern hemisphere having leathery pinnatifid fronds  
- widely distributed fern of tropical southern hemisphere having leathery pinnatifid fronds
Lomariopsidaceae
- small family of usually scandent ferns  
Lomogramma
- large scandent ferns of southeastern Asia  
Lophosoriaceae
- very small family of tree ferns  
Lophosoria
- one species: tree fern of Central and South America  
Loxomataceae
- very small family of New Zealand ferns  
Loxoma
- one species of terrestrial ferns of New Zealand  
Lip Fern
- any of various terrestrial ferns of the genus Cheilanthes; cosmopolitan in arid and semiarid temperate or tropical regions  
- any of various terrestrial ferns of the genus Cheilanthes; cosmopolitan in arid and semi-arid temperate or tropical regions
Lipfern
- any of various terrestrial ferns of the genus Cheilanthes; cosmopolitan in arid and semiarid temperate or tropical regions  
Lipferns
- any of various terrestrial ferns of the genus Cheilanthes; cosmopolitan in arid and semiarid temperate or tropical regions