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Telopea 9(2): 2001 
Key to the lichen genus Phaeographina in Australia 
1 Ascospores densely muriform, > 75 pm long . 2 
1* Ascospores not densely muriform, < 75 pm long . 10 
2 Carbonised proper exciple absent . 3 
2* Carbonised proper exciple present... 4 
3 Lichen compounds absent; ascospores 155-212 pm long. P. hadrospora 
3* Norstictic acid present; ascospores 100-135 pm long . P. atromaculata 
4 Proper exciple partly carbonised . 5 
4* Proper exciple completely carbonised, concealed in thalline margin. 8 
5 Proper exciple laterally carbonised . 6 
5* Proper exciple apically carbonised; ascospores 1/ascus, 145-180 x 30-40 pm 
. P. muelleri 
6 Exciple exposed; lichen compounds absent... 7 
6* Exciple concealed in thalline margin; ascospores 162-200 pm long; echinocarpic acid 
present ... P. echinocarpica 
7 Exciple sulcate; ascospores 125-180 pm long. P. impudica 
7* Exciple not sulcate; ascospores 75-100 pm long . P. caesiopruinosa 
8 Hymenium red; disc red; ascospores 125-155(-175) pm long . P. montagnei 
8* Hymenium hyaline . 9 
9 Lirellae open; ascospores 75-100 pm long; lichen compounds absent 
. P. quassiicola 
9* Lirellae closed; ascospores 102-130 pm long; hirtifructic acid present .P. elixii 
10 Carbonised proper exciple present. 11 
10* Carbonised proper exciple absent. 13 
11 Proper exciple apically carbonised; ascospores 13-18 pm long, 4x2 locular 
. P. fuscescens 
11* Proper exciple laterally carbonised or completely carbonised; ascospores > 25 pm 
long. 12 
12 Proper exciple completely carbonised; ascospores 38-53 pm long, 8-10 x 4-5 . 
locular; stictic acid present. P. wilsonii 
12* Proper exciple laterally carbonised; ascospores 25-35 pm long, 6 x 2-3 locular lichen 
compounds absent ... P. arechavaletae 
13 Ascospores 40-60 pm long, 10-14 x 2-3 locular . 14 
13* Ascospores < 40 pm long . 15 
14 Proper exciple absent; lirellae open, with white pruinose disc; thalline margin thick, 
lichen compounds absent. P. litoralis 
14* Proper exciple red-brown, complete; lirellae closed; thalline margin thin; stictic acid 
present .... P. chrysenteron 
15 Ascospores 16-18 pm long, 4x2 locular . P. exilior 
15* Ascospores 23-35 pm long, 6-8 x 2-3 locular . 16 
16 Lirellae open; lichen compounds absent . P. caesioradians 
16* Lirellae closed; stictic acid present . P. montiscalvi 
