Pertusaria Group 9

Apothecia present, disciform; ascospores 2 per ascus; on wood

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1	Xanthones present	2
1a	Xanthones absent	4
2	4,5-Dichlorolichexanthone and perlatolic acid derivs. present; N.Am.	P. sulcata Dibben
2a	Thiophaninic acid present	3
3	Thiophaninic acid only present; spores 125-182 µm long; Canary Islands	P. aceroae C.Hdez.-Padr. et al.
3a	Thiophaninic and norstictic acids present; spores 90-155 µm long; N.Am.	P. lecanina Tuck.
4	Lichen compounds absent	5
4a	Lichen compounds present	6
5	Spores 70-115 µm long; N. hemisphere, ?boreal	P. stenhamerii Helb.
5a	Spores 75-90 µm long; S.Am.	P. kalbii A.W. Archer & Messuti
5b	Spores 80-110 µm long; epithecia K+violet; N.Am	P. rhexostoma Nyl. ex Hue
6	Depsidones [protocetraric, norstictic or salazinic acids] present	7
6a	Depsides [2-O-methylconfluentic, gyrophoric, lecanoric, planaic, thamnolic acids] present	11
7	Norstictic acid present	8
7a	Protocetraric acid present; spores 70-156 µm long; Japan, China	P. composita Zahlbr.
7b	Salazinic acid present [trace]; spores 50-55 µm long; China	P. bambusetorum Zahlbr.
8	Spores to 120-300 µm long; disc black; Eur.	P. rhodiensis Erichs.
8a	Spores shorter	9
9	Spores 110-145 µm long	10
9a	Spores 80-100 µm long; Aus	P. amnicola Elix & A.W. Archer
10	Spores 120-145 µm long; discs 0.8-1.3 mm diam.; Aus. Thailand	P. asiana Vain.
10a	Spores 110-135 µm long; discs 0.5-0.75 mm diam.; S.Am	P. purpurascens Müll. Arg.
11(6a)	Thallus K-, KC+ red, C+red	12
11a	Thallus K-, KC-, C-	13
11b	Thallus K+ yellow, thamnolic acid present; spores 100-140 µm long; Japan	P. subcomposita Oshio
12	Lecanoric acid?[KC++ red]; spores 105-125 µm long; Philippines	P. philippina Vain.
12a	Gyrophoric acid present; spores 130-162 µm long; NZ	P. murrayi Elix & A.W. Archer
13	Planaic acid present; spores 100-180 µm long; China	P. paraquilianensis Q. Ren & Z.T. Zhao
13a	2-O-Methylconfluentic acid present; spores 50-140 µm long; Arctic alpine	P. saximontana Wetmore

Botanic Gardens Trust, Sydney, Australia

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Pertusaria Group 9

Apothecia present, disciform; ascospores 2 per ascus; on wood