Botanic Gardens Trust, Sydney, Australia

Science




Pertusaria Group 20

Apothecia present, disciform; ascospores 8 per ascus, on wood

photo = view photo synonyms = view synonyms

1

Lichen compounds absent 

2

1a Lichen compounds present  3

2

Spores 15-20 µm long; disc black, white pruinose; NZ 

P. sporellula A.W. Archer & Elix

2a Spores 34-41 µm long; disc pale grey, epruinose; NZ P. duppensis A.W. Archer & Malcolm

3

Thiophaninic or picrolichenic acid present

4

3a Depsidones or depsides present  5

4

Thiophaninic acid present; spores 60-110 µm long; Eur, N.Am. 

P. hymenea (Ach.) Schaer. synonyms

4a Picrolichenic acid present; spores 19-27 µm long; Aus, NZ  P. truncata Kremp. photo synonyms

5

Depsidones present

6

5a Depsides present 11
5b 5-O-Methylhiascic acid ± stictic acid; spores 33-54 µm long; Alaska P. mccroryae Börk, Goward & Sprib

6

Fumarprotcetraric acid present 

7

6a Norstictic or psoromic acid present  9

7

Fumarprotocetraric acid only present 

8

7a Fumarprotocetraric and gyrophoric acid; spores 22-30 µm; N.Am  P. suboculata Brodo & Dibbe
  Fumarprotocetraric and protocetraric acid present; spores 18-20 µm long; Eur, N. Am; also sterile and sorediate P. borealis Erichs.

8

Spores 10-14 µm long; Eur 

P. pupillaris (Nyl.) Th.Fr.

8a Spores 12-22 µm long; N.Am P. subambigens Dibben

9a

Psoromic acid present; spores 27-40 µm long; China 

 P. wulingensis Z.T.  Zhao & Z.S. Sun

9b Norstictic acid present  10

10

Lichexanthone absent; spores 12-22 µm long; S.Afr 

P. ambigens Nyl.

  Spores 20-32 µm long; S.Afr.  P. elatior Stirt. 
10a Lichexanthone present; spores 16-22 µm long; S.Am  P. phlyctaenula Nyl.

11(5a)

Lecanoric or gyrophoric acid present 

12

11a Thamnolic acid present  14

12

Gyrophoric acid present; spores 20-40 µm long; N. Hemisphere,  

P. carneopallida (Nyl.) Anzi ex Nyl. synonyms

12a Lecanoric acid present 13

13

Spores 58-75 µm long; PNG 

P. kaindiensis A.W. Archer, Elix & Streimann photo

13a Spores 14-22 µm long; with additional gyrophoric acid; N.Am  P. glaucomela (Tuck.) Nyl.
13b With additional lichexanthone; spores 1-seriate, 30-47 µm; S.Am  P. pycnophora Nyl. synonyms

14(11a)

Spores globular, 20-25 µm diam.; PNG 

P. gongylospora Elix & A.W. Archer photo

14a Spores ellipsoid 15

15

Spores 22-32 µm long; Aus, NZ 

P. thamnolica A.W. Archer  photo

15a Spores 30-50 µm long; Malaysia, PNG P. epitheciifera Sipman