KEY. 
Neuropogon. 
Apothecial dise black : : ; Z 5 sulphurea* 
= sphacelata 
Leptinae 
Apothecial dise never black 
Chondroid axis } diameter of thalline filament (internodal 
measurement) 
Erect ; : : ; : ; j . mutabilis 
Non-erect (pendulous) : ; : : .  barbata 
= articulata 
Branches dimorphous v. dimorpha 
Mesinae 
Chondroid axis 4+ diameter of thalline filament 
Erect or sub-erect 
Esorediate 
Branches strigose, attenuate . ; .  strigosa 
Branches not strigose 
Axis hyaline . 5 E : : ; florida 
= major 
Axis rufus ‘ ; ; ; ; . subfusca 
Sorediate 
Virescent 
KOH.-. : ; : ; ; ; hirta 
= intermedia 
KOH + . é : : ; .  endochrysea 
Reddish . : : : ; : . rubiginea 
Not erect, (pendulous) 
Primary branches over } mm. diameter 
Thallus foveolate . ; ; ; ; . cavernosa 
= lacunosa 
Thallus not foveolate 
Branches espinulose, axis hyaline 
Branches evolute 
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