-31- 
Reaction K+, Cl, K(C)+reddish. 
Thallus white or whitish-glaucescent, expanded, orbicular, membran- 
aceous but rigid, appressed but not adherent, lobate, the divisions broad and 
rather confusedly radiating, sub-imbricate centrally, at the circumference 
rounded depressed and plane, the margins there sinuous or faintly crenate, 
centrally undulate, cristate-ascendent and beset with globose or limbate com- 
monly aggregated soredia; above smooth, opaque or somewhat shining, 
eciliate and destitute of isidia; within white; below blackish or brownish and 
sparsely rhizinose, at the circumference paler and glabrous. Apothecia as 
in P. latissima but often explanate, imperforate. Spores in the few fertile 
examples examined smaller than those for P. latissima. On old logs, trunks 
of trees, fence posts and rocks. 
Examined from Jacksonville, Fla. , W. W. Calkins ; vicinity of Sanford, 
Fla., S. Rapp; and from the Hawaiian Islands, A. A. Heller. 
The distinctiveness of this plant specifically, rests on the reaction, ele- 
vated margins of the lobes, and the markedly cristate-aggregated soredia. 
Another factor that serves to separate the species from P. latissima is fur- 
nished by the failure of our southern collectors to discover anything recon- 
cilable with the latter as here defined. Rockland, Maine, 
LICHENS OF THE HOUNT MONADNOCK REGION, N. H. No. 3. 
(See Bryologist, XI: March and July, 1908). 
Reginald Heber Howe, Jr, 
Genus: Parmelia (Ach.) DeNot. 
32. Parmelia perlata (L ) Ach. Three fertile specimens, two thus 
labelled, one marked “perferata.” (Fitzwilliam, not uncommon). 
33. Parmelia perforata (Jacq.) Ach. One fertile specimen belongs 
here. 
34. Parmelia cetrata Ach. Two specimens, one labelled “ perforata'' 
belong here (Fitzwilliam, uncommon.). 
35. Parmelia tiliacea (Hoffm.) Floerk). Two fertile specimens labelled 
thus, and two fertile specimens labelled “ Parmelia Scortea ” (included 
with tiliacea by Fries), one fertile specimen at first labelled P. Russelli ,” 
also seven fertile specimens unlabelled belong here (Fitzwilliam, common.). 
All these by chemical criteria show the following results: K+OI, K(C)+ red, 
which is in no way comparable with the results tabulated by Mr. G .K. 
Merrill in his recent paper on the genus. JBry. XI: p. 92; 1908.) 
36. Parmelia Borreri rudecta Tuckerm. One specimen labelled “ P. 
Russelli white fibres.” Two fertile sperimens labelled “ P. Russelli and 
an unlabeiled specimen belongs here. (Fitzwilliam, uncommon.) 
37. Parmelia saxatilis (L.) Ach. Three sterile specimens, two of 
which are labeled “ saxatilis . ” (One first labelled oinphalodesi). 
38. Parmelia saxatilis sulcata Nyl. Twelve specimens, two labelled 
“ P . saxatilis sulcata ” (one had before been labelled “ Physcia caesia v. 
stellata ” and another “ Pyxine Frostii ”) belong here. Also one specimen 
t ‘ P. laevigata." (Fitzwilliam, common.) 
