Juniper Disco 
King Alfred's Cake 
Kluyveromyces lactis 
Lachnellula agassizii 
Lachnellula arida 
Lachnum bicolor 
Lacy coral lichen 
Lanzia luteovirescens 
Lasiobelonium corticale 
Layered Cup 
Leaf Spot 
Lecanora caesiorubella 
Lecanora campestris 
Lecanora chlarotera 
Lecanora gangaleoides 
Lecanora hybocarpa 
Lecanora strobilina 
Lecanora symmicta 
Lecidella elaeochroma 
Leotia atrovirens 
Lepraria incana 
Leptosphaeria pratensis 
Lichen Ramalina bourgeana 
Lipstick Powderhorn