PART 1

ascospores 18-24 × 3 µm; Louisiana,
not yet found in Florida...........................................................[O. leucoplaca Müll. Arg.]
12. Ascospores broader, 4.5-6 µm wide; disk becoming exposed, black .............................. 14
14. Hymenium not inspersed; ascospores18-20 × 5-6 µm;
Duval County........................................................................................... O. varia Pers.
14. Hymenium inspersed; ascospores 20-27 × 4.5-5 µm;
Southwest Florida, Mar 1878, Smith & Austin 82.............................Opegrapha sp. 82
11. Ascospores 8-14-celled......................................................................................................... 15
15. Ascospores narrow, 3-4 µm wide.................................................................................... 16
16. Ascospores 12-14-celled, 30-55 × 3-4 µm; thallus dark;
disk hidden; lirellae fusiform or once branched; south to
Polk County ..................................................... O. viridis (Ach.) Behlen & Desberger
16. Ascospores 8-celled, 32-43 × 3 µm; thallus pale;
disk hidden; lirellae branched, flaring out at base;
Dade and Monroe counties ................................................ Opegrapha sp. Small 471
15. Ascospores broader, 5-7 µm wide .................................................................................. 17
17. Hymenium not inspersed; disk becoming exposed;
lirellae small, fusiform to linear, rarely once branched;
ascospores 7-8-celled, 35-40 × 5-7 µm; Dade County..................................................
.........................................................................................Opegrapha sp. Britton 799
17. Hymenium inspersed; disk hidden; lirellae coarse,
simple to weakly asteriform; ascospores 7-8-celled,
40-45 × 5-6.5 µm; Collier County .....................................Opegrapha sp. Britton 652
8. Disk becoming broadly expanded, covered by a dense layer of white
material; margin black, usually lacking at base; lirellae long, flexuose,
branched; ascospores rarely produced?, (4-)6-celled, ca. 24 × 5 µm;
Duval, Polk and Putnam counties ........................................................................... O. astraea Tuck.
7. Growing on bamboo culms or rock ...................................................................................................... 18
18. Growing on bamboo culms (normally a foliicolous species);
ascospores narrow, 4-6-celled, 18-25 × 3-4 µm; Louisiana,
not seen from Florida ..............................................................................................[O. filicina Mont.]
18. Growing on limestone; lirellae sessile, fusiform to linear,
not branched; ascospores 5-6-celled, 20-22 × 4 µm; Keys................................................................
..............................................................................................................Opegrapha sp. Britton 869
SCHISMATOMMA Massal.
Tehler (1993) has removed S. rappii, the only Florida species, from Schismatomma s. str. and
suggested that it be placed provisionally in Enterographa s. lat.
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