+ 
late, we must maintain this name in the sense in which Sullivant 
and all subsequent authors have used it. Bridel was the first to 
apply it to the tree species definitely, for in the Bryologia Univer- 
salis (1: 273, 1826) he says, of the habitat of this species: 
“In America boreali, arborem, ut e speciminibus a D. Torrey 
Noveboraco missis corticique adnatis video, nec terrigenum caes- 
pitose habitat.” 
The “nec terrigenum” refers to the habitat given by Schwe- 
grichen in his supplement, where he says, “ probabiliter rupestre _ 
aut terrigenum.” But he cites Schwegrichen’s description almost 
word for word, describing the teeth as sixteen, whereas if the 
specimens sent him by Dr. Torrey were from trees they must have 
had eight teeth united in pairs. This does not affect the question 
of the name, however, though I have sent specimens of O. strangu- 
latum Sull. (Beauv. ?) and O. Porteri to Berlin for comparison with 
Bridel’s specimens. 3 
Braithwaite (Brit. Mosses, 2: 77) cites O. strangulatum Beauv. 
as one of the synonyms of O. cupulatum Hoffm. and quotes 
Schwegrichen’s Supplement t. LIV. also for this species. Now it 
seems to me that tables LIV. and LV. disprove this, for certainly | 
the true differences between O. cupulatum Hoffm. and O. strangu- 
latum Schweeg. are clearly figured in these two plates and. show — 
that as early as 1816 the specific value of O. Porteri was recog- 
nized, even though all later authors have referrcd it to O. cupula- 
tum as a variety. 
ORTHOTRICHUM STELLATUM Brid. Bryol. Univ. 1: 274 (1826). 
Since Renauld and Cardot have listed this name in their cata- 
logue of mosses of North America as No. 552, and it has been 
omitted from all our text-books, it seems of interest to look into 
the matter, especially as Bridel says: 
«0. strangulato proximum, et foliis supremis stellatis, ut et 
peristomii structura et calyptra glaberrima ab eo distinctum. 
« Species propria esse videtur. 
“In Massachusetts Americae Septridnalis ad arbores habitat. 
D. Torrey Noveboraco misit.” 
I have not been able to find any specimens in Dr. Torrey’s - 
herbarium labelled O. stellatum, nor O. strangulatum, but it seems 
to me the explanation is this: Dr. Torrey sent him the tree species 
labelled QO. strangulatum, which on comparison with the descrip- 
