SriLankaLichens_Book_eng - page 32

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99 Medulla P- 102
100 Medulla K+ bright
yellow (stictic acid)
Parmotrema
perlatum (Huds.)
M. Choisy
100
Medulla K- (or K+
dirty yellow-brown),
(protocetraric acid)
101
101
Upper surface grey-
green. Medulla white
throughout
Parmotrema
gardneri (C.W.
Dodge) Sérus.
101
Upper surface
yellowish (usnic acid).
Medulla with a
yellowish pigment
below upper cortex
Parmotrema
dilatatum (Vain.)
Hale
102
Soralia laminal,
initially somewhat
pustulate
Canoparmelia
texana (Tuck.)
Elix & Hale
102 Soralia marginal, not
pustulate 103