— 6o 
Physcia hispida (Schreb., Fr.)Tuck. Six specimens, all sterile. One 
is labelled “ Physcia hispida , Nantucket,” two others “ Physcia 
comosa, Nantucket.” There is no reason to suppose that this group 
of specimens came from any other locality than Nantucket. 
61 . Physcia c.esia (Hoffm.) Nyl. Nine specimens, one fruited, thus 
labelled, belong here. One labelled “ Physcia caesiasr. squmulosa ,” 
and two, one fertile, labelled “ Parmelia ambigua v. albescens ” 
also belong here, as well as two unlabelled specimens, one of 
which is doubtful on account of its small size. (Fitz'william — one 
example, first called Physcia stellaris aipola). 
This species it seems to me should be much commoner in herbariums 
than it is, and perhaps this is because it is so often confused with 
P. tribacia (Ach.) Tuck., which species, if in the typical state, itdoes 
notin the least suggest. It seems, however, to me to be probably over- 
looked as abraded conditions of P. stellaris , or the rare P. astroidea. 
Without attempting to be critical I am convinced that the mate- 
rial distributed (judged by the specimen I received) by Mrs. C. W. 
Harris (Bryologist — offering of March) is tribacia rather than 
caesia, and the accompanying illustration of a specimen determined 
by Prof. Tuckerman it is hoped may help in the further determination 
oi material by members of the Moss Society.* 
62 . Physcia obscura (Ehrh.) Nyl. Nine specimens, seven fertile, are all 
labelled thus, and belong here; also one fertile specimen labelled 
“ Physcia v. ulothrixp and one unlabelled sterile specimen. (A 
much reduced sorediate state is found on the stone walls at Fitz- 
william), 
63. Physcia obscura endochrysea Nyl. Six fertile specimens, three unla- 
belled, one labelled “ Physcia erythrocardiap one “ Physcia endo- 
crysea,” and one “ P. obscura v.” also belong here. (Fitzwilliam , 
common). 
64 . Physcia setosa (Ach.) Nyl. Two sterile specimens labelled fhus belong 
here, and five unlabelled sterile specimens. One fertile unlabelled 
specimen also belongs here. Mounted with one of these is an unde- 
terminable Physcia . 
Physcia adglutinata (Floerk ) Nyl. Two specimens, one labelled 
“ P. agglutinata ” is possibly referable here, though it is unusually 
large lobed. Another labelled as above, is Parmelia Borreri 
rudecta Tuck. 
A sterile specimen labelled '■'■Physcia granuliferal ,” first labelled 
“ Pannaria lanuginosa v. granulosa ” appears to be Parmelia 
saxatilis (L.) Fr. 
Genus ; Pypine, Fr. Tuck. 
65. Pyxine- sorediata Fr. Four specimens, three fertile, thus labelled, 
belong here. (Fitzwilliam, common). Concord, Mass. 
TO BE CONTINUED. 
* See also fine colored figure in Hoffman’s Descriptio et Adumbratio Lichenes, 179U, 
p. 87, Tab. Vlll. fig. 2 a. b. 
