54 Rhodora [Marcu 
Racomitrium canescens (Timm.) Brid. Sterile; covering several 
square feet of a ledge over which some water flows in rainy times. 
Orthotrichum obtustfolium Schrad. On base of poplar tree in Ply- 
mouth Village, mixed with O. speciosum and O. Braunit. The leaves 
bore the characteristic oblong septate gemme. 
Schistostega osmundacea (Dicks.) Mohr. ‘The protonema of this 
remarkable moss is abundant on the floor of the “ Devil's Den” on 
rocks, earth, and fragments of decaying wood, but a careful search 
both in autumn and in spring revealed just one solitary sterile plant. 
Those who have never seen the fresh protonema under the microscope 
can have no idea of its beauty. 
Bryum capillare L. Moist ledges, Mt. Prospect ; sparingly fruited ; 
determined by Mrs. E. G. Britton. 
Pohlia Lescuriana (Sull. & Lesq.). On moist soil close to a small 
boulder. 
Mnium cinclidioides (Blytt.) Hueb. Growing on the soil in a 
swampy place, closely interwoven with Hypnum cordifolium. Many of 
the leaves were somewhat denticulate, with projecting cells, as is noted 
by Mr. H. N. Dixon in his admirable Handbook of the British Mosses. 
M. Drummondii Br. & Sch. On rocks near brook with M. cuspi- 
datum (L.) Neck. 
AM. stellare Reich. On humus at base of tree in woods; sparingly 
fruited. 
Anomodon tristis (Cesat.) Sulliv. On trees with Veckera pennata ; 
also on rocks. 
Pterigynandrum filiforme (Timm.) Hedw. A minute depauperate 
form of this species has been collected from damp rocks near the sum- 
mit of Plymouth Mountain; Dr. Best refers it with some doubt to var. 
minus L. & J. 
Hylocomium Pyrenaicum Lindb. On rocks in woods, Plymouth 
Mountain. 
Plagiothecium Muellerianum Sch.  Clefts in cliff about one mile 
from Plymouth Village ; Devil's Den, Mt. Prospect. It seems that this 
species is usually sterile and therefore overlooked. It has a very dis- 
tinct habit and is easily recognized when once known. The stems and 
branches are very slender, more so than in any other species known to 
me, and very much flattened. Under the microscope it is easily re- 
cognized by the greatly enlarged and inflated cortical cells of the stems 
and branches. Sullivant's figure, Icones Musc. Suppl. pl. 66, shows 
