— 29 — 
and is divided into four subgenera with 35 species of Drepanium a number 
which can be materially reduced; three of Heterophyllum and under Secjtion 
IV. Pseudo-Raphidostegium Brotherus founds a new section where we are 
surprised to meet S. recurvans and S. delicatiilus . This transfer is open to 
serious question as there seems to be no good reason for not placing these 
species with their closely related allies in the Sematophyllaceae in section 
Cupressinopsis on pp. 1109 and mo, where their inflated alar cells and 
rostrate lids properly place them ! 
The P lagiothecieae are subdivided into Isopterygium with 22 species ; 
Plagiothecium with 16 species; Catagonium C. M. with one species from 
Panama ; Taxithelium with three species of which T. planum occurs in Florida- 
Vesicularia C. M. is maintained as distinct from Ectropothecium and V. 
antphibolum and V. vesicularis are transferred to this genus. 
The Leucomiaceae are a small tropical family of two genera; two species 
of Lecomium occur in the West Indies. 
The Sematophyllaceae contain some questionable decisions. It is sur- 
prising to find that Pterogonidium C. M. 1897 is described- and that Ptero 
goniella (Sch.) Jaeger is dropped entirely, presumably because Jaeger 
subdivided it into Meiothecium and Potamium . It is quite correct, however, 
to separate Pt. pulchella from Meiothecium where Jaeger placed it and to 
recognize this as a genus with three West Indian species with Sauloma, as used 
by C. Muller, as a synonym. Raphidostegium is maintained with five sub" 
genera and 38 species. Trichosteleum includes six species and Semato- 
phyllum three species, all West Indian and Central American. 
The Rhegmatodontaceae, contains Rhegmatodon with two Mexican 
species. The Brachytheciaceae are also extensively subdivided including 
Horn a lothecie l la with three North American species, Homalothecium with two 
species, Pleuropus with one West Indian species; Ca 7 nptothecium with three 
subgenera and 13 species; Scleropodium with seven species and Cirriphyllum 
which is not completed in this part. New York Botanical Garden. 
LICHEN NOTES No. 9. 
Parmelia latissima Fee and Two Commonly Associated Species. 
G. K. Merrixl. 
The lichens described below have for the most part been correlated under 
the na'me of Parmelia latissima Fee by our American students. This view, 
apparently sanctioned by Tuckerman’s,; Synopsis, seems to have met all the 
requirements of our investigators. No explanation is ready at hand to ac- 
count for Tuckerman’s failure to at least record the synonymy for P. 
latissima, and it may be assumed that he considered the distinctions upon 
which were based P. coralloidea , P. cristifera , etc. to be ineffective. A 
comparison of the description here undertaken for these plants will help to a 
proper comprehension of the group, and supply data for more intelligent 
identification. 
Parmelia latissima Fee Essai Cryptog. Suppl, (1837; p. 119. 
