404 
the hairs of the calyptra in O. Porteri are distinctly papillose.and. 
composed. of 3-4 series of cells, whereas those of O. anomalum, if 
they exist at all, are almost simple. With O. nudum and QO. Sar- 
dagnanum, it has no resemblance, as their distinctive character is 
the defluent neck of the capsule. I shall, therefore, uphold the 
autonomy of O. Porteri, leaving solely O. Peckii as a variety of O. 
cupulatum, as | have modified my opinion since I wrote the mono- 
graph for M. Husnot. 
As for O. Lescurii, that also is in my opinion, an excellent 
species, even though the very small capsules have the form: of the 
capsule of O. cupulatum ; forthe ridges are always eight in O. Les- 
cura, and the peristome is papillose and without a preperistome,. 
besides all the other characters which determine a species.” 
I do not agree with Dr. Venturi in referring O. Peckit as a 
variety to O. cupulatum, for it has only eight ridges to the capsule, 
which is also elongated as in QO. Porteri, and it is to the latter 
species which it should be referred as a synonym, to which posi- 
tion Austin consigned it in his herbarium and in the BULLETIN 
(vi. 341,.1879). 
ORTHOTRICHUM BRACHYTRICHUM, Schimper. 
O. brachytrichum, Sch.; L. & J. Proc. Am. Acad. xiv. 140 
(1879). 
Drummonds Musci Americani, 157 pp. with O. odtusifolium. 
Austin, Bull. Torr. Bot. Club, vii. 8 (1880).. Macoun’s Cat. 90 
(1892). 
We have been favored with a portion of the type of this species 
from Kew, and have also seen four sets of Drummond’s mosses. 
Dr. Torrey’s, Sullivant’s and those, belonging to the Academy of 
Natural Sciences of Philadelphia, and the Geological Survey of 
Canada at Ottawa. In all except Sullivant’s the specimens are all 
O. obtusifolium, but in his set they are mixed with O. drachy- 
trichum. The type of the latter, though much resembling the for- 
mer in its erect-appresssed leaves, bearing septate propagula, has 
the leaves acuminate, not obtuse, at apex, often erose or denticu- 
late, occasionally cuspidate and hyaline like O. diaphanum; the 
margins are revolute and the cells faintly protuberant, not papil- 
lose; the stomata are immersed, not superficial, and the calyptra 
sparsely hairy. It differs from O. diaphanum in having only eight A 
cilia, and the teeth are united in pairs (4-parted), not single. 
