Pertusaria Group 14

Apothecia present, verruciform; ascospores 2 per ascus, rough; on wood

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1	Xanthones present	2
1a	Xanthones absent	11
2	Norlichexanthone derivatives present	3
2a	Lichexanthone and derivatives present	5
3	Arthothelin and 6-O-methylarthothelin present; spores 80-110 µm long; Eur.	P. dispar J. Steiner
3a	Thiophaninic and stictic acids present	4
4	Spores 70-150 µm long; N.Am, China	P. xanthodes Müll. Arg.
4a	Spores 90-120 µm long; Eur.	P. heterochroa (Müll. Arg.) Erichs.
4b	Spores 140-165 µm long; Socotra	P. subflavens Müll. Arg.
5	Lichexanthone present; spores 170-225 µm long; S.Am. [also 1 per ascus]	P. tetrathalamia var. major Müll. Arg.
5a	Chlorolichexanthones present	6
6	4-Chlorolichexanthone and 2-O-methylperlatolic acid present; spores 190-250 µm long; NZ	P.'communis' sens. Knight (M)
6a	2-Chlorolichexanthone and conhypoprotocetraric acid present; spores 87-105 µm long; NZ	P. southlandica A. Knight, Elix & A.W. Archer
6a	Polychlorolichexanthones present	7
7	4,5-Dichlorolichexanthone, perlatolic and stenosporic acids present; spores 160-240 µm long; NZ; cf. saxicolous P. allani Zahlbr.	P. sorodes Stirt.
7a	4,5-Dichlorolichexanthone and 2'-O-methylperlatolic acid present; spores 95-120 µm long. Australia	P. trachyspora A.W. Archer
7b	Other polychlorolichexanthones present	8
8	2,4- & 2,5-Dichlorolichexanthone, 2,4,5-trichlorolichexanthone and stictic acid present	9
8a	2,5-Dichlorolichexanthone, 2,4,5-trichlorolichexanthone, 2'-O-methylperlatolic and 2-O-methylperlatolic acids present; spores 140-175 µm long; Aus.	P. elliptica Müll. Arg. var. bispora Elix & A.W. Archer
9	Thallus lacking isidia & soredia; spores 100-150 µm long; ?circumtropical	P. cicatricosa Müll. Arg.
9a	Thallus with isidia or soralia	10
10	Thallus isidiate; spores 116-180 µm long; Thailand	P. takensis Jariangprasert & A.W. Archer
10a	Thallus sorediate; spores 126-204 µm long; Thailand	P. langsangensis Jariangprasert & A.W. Archer
11(1a)	Depsidones and ±depsides present	12
11a	Depsidones absent; depsides present	20
12	Depsidones [stictic or norstictic acid] and depsides present	13
12a	Depsidones only present	15
13	Stictic and 2'-O-methylperlatolic acids present; spores 150-175µm long; PNG	P. bundiensis A.W. Archer & Elix
13a	Norstictic acid present	14
14	Norstictic and divaricatic acids present; spores 120-166 µm long; PNG, Thailand	P. allothwaitesii Jariangpraseret & A.W. Archer
14a	Norstictic ±planaic acids present; spores 100-160 µm long; N.Am	P. neoscotia Lamb
14b	Norstictic and 2-O-methylstenosporic acids present; spores 120-137 µm long, rough; India	P. wattiana Müll. Arg.
14c	Norstictic acid and atranorin present; spores 70-157 µm long; India	P. hirtella Singh & Sinha
15	Fumarprotocetraric, protocetraric or hypoprotocetraric acids present	16
15a	Stictic, norstictic acid or variolaric acids present	18
16	Hypoprotocetraric acid present; spores 125-175 µm long; NZ	P. vallicola Elix & Malcolm
16a	Fumarprotocetraric or protocetraric acids present	17
17	Fumarprotocetraric acid present; spores 75-135 µm long; N.Am, China	P. subpertusa Brodo
17a	Protocetraric acid present; spores 110-160 µm long; Aus, PNG, Asia	P. thwaitesii Müll. Arg.
18	Variolaric acid present; spores 100-120 µm long; N.Am	P. obruta Harris
18a	Stictic or norstictic acids present	19
19	Stictic acid present; spores 110-125 µm long; PNG	P. cicatricosa Müll. Arg. var. deficiens A..W. Archer & Elix
	Stictic and menegazziaic acids present; spores 150-175 µm long; India	P. neilgherrensis (Müll. Arg.) Awasthi & Srivastava
19a	Norstictic acid present; spores 150-200 µm long; PNG	P. perthwaitesii A.W. Archer & Elix
20(11a)	Methyl 2-O-methyldivaricatate and 2-O-methyldivaricatic acid present; spores 86-150 µm long; Thailand	P. litchicola Jariangprasert & A.W. Archer
20a	2'-O-Methylperlatolic acid present; spores 185-250 µm long; PNG	P. subsorodes Elix & A.W. Archer

Botanic Gardens Trust, Sydney, Australia

Science

Pertusaria Group 14

Apothecia present, verruciform; ascospores 2 per ascus, rough; on wood