PART 1

ascospores 1-2 × 4-celled, 13-16 × 7-10 µm; throughout Florida .............................................M. glaucescens (Nyl.) Hale
5. Thallus PD+ red (protocetraric acid); ascomata large, emergent with
a simple to divided columella; ascospores 1-3 × 5-6-celled, 16-24 × 12-14 µm;
Collier, Dade, Lee and Lake counties............................................................................................... M. bahianum (Ach.) Hale
4. Thallus PD- (no substances), with large polygonal crystals, usually with
pockets of bright red pigment; ascospores 2 × 4-celled, 14-18 × 10-14 µm;
throughout Florida ....................................................................................................................................M. wightii (Taylor) Hale
3. Spores 1-2/ascus, densely muriform, 70-130 × 20-30 µm; thallus PD+ orange
(stictic acid agg.); common, south to Highalnds County ...............................................................M. reclusum (Krempelh.) Hale
2. Ascospores colorless; apothecia smaller ........................................................................................................................................... 8
8. Spores submuriform........................................................................................................................................................................ 9
9. Apothecia small, 0.3-0.4 mm across, immersed; thallus light gray with
numerous crystals; psoromic acid; ascospores 1-3 × 3-5-celled,
9-20 × 4-6 µm; south to Hillsborough County .....................................................................................M. rugiferum (Harm.) Hale
9. Apothecia larger, to 1.0 man, emergent, with broad rounded pore;
thallus pale tan with numerous crystals; stictic acid agg. or acid deficient;
ascospores 1-2 × 6-7-celled, 18-25 × 6-8 µm; throughout Florida ................................................... M. peninsulae R. C. Harris
8. Spores transversely septate.......................................................................................................................................................... 10
10. Cortex UV+ yellow, medulla PD- (lichexanthone, hypoprotocetraric acid);
ascospores 4-celled, 10-12 × 5-6 µm; Dade and Monroe counties ................................................... M. glauculum (Nyl.) Hale
10. Cortex UV-, medulla PD+ yellow (psoromic acid); ascospores 3-4-celled,
9-15 × 4-7 µm; Alachua County....................................................................................................... M. terebratulum (Nyl.) Hale
1. Thallus sorediate; protocetraric acid; ascospores colorless, 6-10-celled,
42-46 × 9-11 µm; throughout Florida ................................................................................................................ M. erodens R. C. Harris
NADVORNIKIA Tibell
1. Thallus sorediate; throughout Florida ..............................................................................................................N. sorediata R. C. Harris
1. Thallus not sorediate; Highlands County..................................................................................................N. hawaiiensis (Tuck.) Tibell
OCELLULARIA G. Meyer
1. Ascospores colorless .............................................................................................................................................................................. 2
2. Ascospores transversely septate ......................................................................................................................................................... 3
3. Ascoma smaller; medulla C-; ascospores under 50 µm long........................................................................................................... 4
4. Thallus PD+ yellow or PD- ............................................................................................................................................................ 5
5. Thallus PD+ yellow (psoromic acid).......................................................................................................................................... 6
6. Columella present .................................................................................................................................................................. 7
7. Ascospores 6-8-celled, 17-24 × 6-7 µm; apothecial margin
not erect; pore usually small; columella undivided; common,
throughout Florida ................................................................................................................ O. granulosa (Tuck.) Zahlbr.
7. Ascospores 8(-9)-celled, 23-33 × 5-6 µm; apothecial margin
erect; disk ± broad; columella becoming reticulate; rare,
Collier County .............................................................................................................O. emersa (Krempelh.) Müll. Arg.
6. Columella absent; ascospores 6-8-celled, 25-32 × 9-11 µm;
Monroe County (Keys)..................................................................................................................Ocellularia sp. Small 9122
5. Thallus PD- (no substances); apothecia emergent; rim often eroding
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