PART 1

9. Medulla PD+ orange ............................................................................................................................................................... 10
10. Stictic acid agg. present; ostioles often yellow and raised;
ascospores 45-75 × 21-33 µm; throughout the state.............................................................................P. texana Müll. Arg.
10. Virensic and an unknown (PD-) present; ostioles not yellow and raised;
ascospores 60-70 × 28-35 µm; Highlands and Okaloosa counties.............................................. P. virensica R. C. Harris
9. Medulla PD-............................................................................................................................................................................. 11
11. Containing variolaric acid; ascospores basally biseriate to uniseriate,
65-90 × 30-40 µm; ostiolar area often depressed and yellow;
Duval, Leon and Liberty counties.................................................................................................P. epixantha R. C. Harris
11. Containing unknown substance (perlatolic/confluentic acid group);
ascospores uniseriate, 55-60 × 25-28 µm; ostiolar area not yellow;
Duval County .......................................................................................................................................Pertusaria sp. 23902
8. Cortex UV+ pinkish (coronatone) or UV- .................................................................................................................................... 12
12. Cortex UV-; medulla PD- (unknown substance); ascospores uniseriate, rough,
70-95 × 30-40 µm; south to Highlands County ........................................................................................ P. iners R. C. Harris
12. Cortex UV+ pinkish (coronatone); medulla PD+ pink-orange (stictic acid agg.);
apothecial warts very irregular; ascospores uniseriate, smooth,
50-60 × 27-30 µm; Lake County.............................................................................................................Pertusaria sp. 23573
7. Cortex UV+ yellow (lichexanthone); medulla K-, P- (4-O-methylperlatolic acid);
ascospores uniseriate, 55-100 × 28-40 µm; south to Marion County.................................................P. paratuberculifera Dibben
6. Ascospores basically 2 or 4/ascus (1-5) ............................................................................................................................................... 13
13. Ascospores 4/ascus ......................................................................................................................................................................... 14
14. Cortex UV+ pinkish or UV-.......................................................................................................................................................... 15
15. Medulla PD+ pink-orange (stictic acid agg.); hymenium not inspersed................................................................................ 16
16. Ascospores smooth, 50-100 × 23-43 µm; Duval County (reported by Dibben
from Lee and Seminole counties also) ............................................................................. P. leucostoma (Bernh.) Massal.
16. Ascospores rough, 75-130 × 27-43 µm; throughout the state...................................................P. tetrathalamia (Fée) Nyl.
15. Medulla PD- (traces of unknown); hymenium densely inspersed;
ascospores smooth, 63-100 × 30-45 µm; throughout the state...................................................... P. sinusmexicani Dibben
14. Cortex UV+ orange (xanthone X-l); medulla PD+ pink-orange (stictic acid agg.);
ascospores smooth, 90-105 × 30-35 µm; St. Lucie and Pinellas counties ........................................ Pertusaria sp. Britton 829
13. Ascospores 2/ascus ......................................................................................................................................................................... 17
17. Medulla PD+ orange .................................................................................................................................................................... 18
18. Medulla PD+ pink-orange (stictic acid agg.).......................................................................................................................... 19
19. Ascospores rough, 55-125 × 28-45 µm; ostiole pale; cortical xanthone
thiophaninic acid; throughout the state ......................................................................................... P. xanthodes Müll. Arg.
19. Ascospores smooth, 65-135 × 27-40 µm; ostiole dark; cortical xanthone,
xanthone X-l; reported by Dibben from Duval and Seminole counties .......................................P. pustulata (Ach.) Duby
18. Medulla PD+ orange-red (fumarprotocetraric acid); cortex UV-
(unknown xanthone); ascospores somewhat roughened,
75-135 × 30-45 µm; Lake and Marion counties .....................................................................................P. subpertusa Brodo
17. Medulla PD- (variolaric acid); cortex UV- (no xanthone); apothecia mostly
immersed; ascospores somewhat roughened, 100-120 × 30-40 µm; Marion
and Wakulla counties...................................................................................................................................P. obruta R. C. Harris
49