PART 1

SCLEROPHYTON Eschw.
Only the single species, S. inscriptum (Nyl.) Müll. Arg., is in Florida. Egea & Torrente (Bryologist 98:
207-217. 1995) have revised Sclerophyton s. lat. for North America. They provide excellent illustrations. In
1990 I suggested that Sclerophyton should be restricted to the hyaline spored species with dendroid,
immersed ascomata and I am still of this opinion. Egea and Torrente retained the old, broad definition,
recognizing that there are two distinct groups in the genus so constituted, but provided no reasons as to why
they should be joined in a single genus. Superficially S. inscriptum (North America) and S. elegans Eschw.
(Brazil) are identical and both contain psoromic acid. My first thought was to synonymize them. Egea and
Torrente suggested that they are conspecific but did not formally make the synonymy. However, examination
of an isotype of S. elegans (H-Nyl 4583) revealed that the ascospores are slightly smaller (13-14.5 × 4-5 µm)
than in S. inscriptum, (15-20 × 5 µm). Pending study of more material, I agree the two should be kept
separate.
GRAPHIDALES
GRAPHIDACEAE Dumortier
I had hoped to completely revise this family. However, I have had to be content with a few minor additions and corrections. I
now have collections of at least a dozen species not treated in 1990 and expect that more will turn up, making this one of the most
speciose families among the lichen-forming fungi in Florida.
KEY TO GENERA
1. Ascomata immersed to sessile, mostly elongated with a narrow, often slit-like disk;
not aggregated in a pseudostroma ......................................................................................................................................................... 2
2. Spores colorless................................................................................................................................................................................... 3
3. Spores transversely septate...................................................................................................................................................Graphis
3. Spores submuriform to densely muriform........................................................................................................................... Graphina
2. Spores brown ....................................................................................................................................................................................... 4
4. Spores transversely septate....................................................................................................................................... Phaeographis
4. Spores submuriform to densely muriform................................................................................................................ Phaeographina
1. Ascomata with brown disk, cup-like or aggregated in a pseudostroma................................................................................................. 6
5. Ascomata cuplike with a thick raised margin; disk brown; hymenium not inspersed;
ascospores colorless to weakly tinted, muriform with 9-11 longitudinal cells,
33-48 × 13-16 µm; no substances; throughout Florida......................................................Gyrostomum scyphuliferum (Ach.) Nyl.
5. Ascomata aggregated in a pseudostroma.......................................................................................................................................... 6
6. Spores muriform, colorless becoming brownish in age, 35-50 × 8-9 µm;
pseudostroma well developed, usually gray pruinose; hymenium not inspersed;
no substances; throughout Florida......................................................................................................... Glyphis cicatricosa Ach.
6. Spores transversely 4-6-celled, brown; pseudostroma poorly developed,
usually whitish............................................................................................................................................................. Sarcographa
GLYPHIS Ach.
Only a single species in North America. Redinger (1934) in his treatment for Brazil synonymized the names which also appear in
the North American list, choosing Glyphis cicatricosa Ach. from among the competing synonyms. See generic key for diagnosis.
GRAPHINA Müll. Arg.
1. Lirellae not carbonized ............................................................................................................................................................................ 2
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