Notes on two of Palisot de Beauvois species of 
ro __ Orthotrichum. de > 
 Fhave learned from M. Bescherelle that the collections of 
 P. de Beauvois are preserved in the Delessert Herbarium at 
_ Geneva, and portions of his types were sent to Schwæ- 
richen to figure in his Supplement and are in the Boissier 
erbarium. 4 x 
= Through the kindness of M. Eugene Autran I have seen 
the types of Orthotrichum Americanum, Beauv. (1803) and am 
USLS) that they antedate Orthotrichum Hutchinsiæ, Smith 
AENRRE strangqulatum Beauv. has also been much mi- 
sunderstood, and although Schwægrichen figured and des- 
cribed it correctly (Suppl. LE. ii. 33, t. LIV., 1816) and sta 
that it probably grew on rocks or earth, yet Bridel. Mülle 
a Sullivant misapplied the name to a tree-species, 0. Brau 
ni, Br. et Sch. (0. strangulatum, Sull., Icon. 57 t. 36, 1864) 
Braithwaite (Brit. Mosses, ü. 17, 1889) cites 0. strangulatum, 
Beauv. as a synonyme of O0. Cupulatum. Hoffm, but he too, 
is mistaken, as Sc ocgieue'e plates LIV and LV show. It 
is closely related tho the latter species, and I believe that 
itis O. Porteri, Austin, for the type localities are the same, at 
Lancaster, Pennsylvania. 
L'also suspect that 0. stellatum, Brid. (1826) antedates 0. 
Brauni, Br. et Sch. (1837), but there is one fault in the des- 
cription, the cilia are not mentioned. As they are fragile an 
fagacious, in all old specimens, that might be accounted fo 
If Bridel’s type is in existence, I should very much like | 
know how it compares with 0. Braunii, Sch. Ce 
the DEEE Eutsagera G. BRITTON, 
Columbia College, New-York. 
4 £ 
k: 
Sur la Nomenclature 
… Rien n'est ennuyeux, à mon avis, comme les changement 
de noms universellement employés. Il y a quelques années, 
tout le monde savait ce qu’il fallait entendre par Sphagnum 
contortum et Sphagnum laricinum ; mais aujourd’hni, si 
trouve une mousse étiquetée « Sphagnum contortum Sckulz » 
il est difficile, à moins de la redéterminer, de savoir si c'est 
au laricinum ou au rufescens qu’elle appartient, 
On ne peut, en eflet, se fier à la date et dire: toutes 
quettes portant des dates antérieures à la publication de 
Warnstorf appartiendront au rufescens, les autres au lari- 
