44 



botanical gazette. [February, 



proven that these changes were due to the same cause, another 

 means of deciding the question as to the cause of the fall 

 growth of wood, or year's rings, would be obtained. 



In concluding, the author begs leave to express thanks for 

 all assistance from friends, in the way of material kindly fur- 

 nished from various sources ; especially to Dr. C. S. Sargent 

 and to Mr. Meehan, of Philadelphia. 



Biological Deft, Univ. of Penn. 



Erratum.— Page 252, line 23d from top, should read, According to the 

 place, etc. 



Notes on North American Mosses. I. 



CHARLES R. BARNES. 



About a year ago, Mr. F. H. Knowlton, of the National 

 Museum, sent me a package of mosses collected in August, 

 1887, by William Palmer, mostly on the Mingan Islands, 

 which lie between Anticosti and the southern shore of Labra- 

 dor. As the publication of the bulletin concerning this col- 

 lection is delayed, it is thought best to publish the list in the 

 Gazette. It includes one new species. 



1. Sph< 1 fjnum papillosum Lindb. In wet woods mixed with No. 8. St. 

 Johns, Newfoundland. 



% Gymnoxtomum rupestre Schleicher (1807), On limestone cliffs, Min- 

 gan. This is one of the forms of this polymorphous species approaching 

 G. curvirostrum closely, but it seems hardly worth while to give it a 



name. 



8. Dicrancm undulatum Ehrhart. Sand beaches, among trees, Min- 

 gan. This is the D. undulatum of Lesquereux and James's Manual. D. 

 undulatum Turner is D. Bonjeani De Not. 



4. Bryum indinatum Br. & Seh. On limestone cliffs, Mingan. 



5. Bryum Kxowltoxi. (S Cladodium.) ' 



Plants densely cespitose ; tufts 1-2 cm. deep, interwoven 

 with red-brown rhizoids, mottled. Stems copiously branched 

 by innovations, reddish. Leaves closely imbricate in bud- 

 like tufts at the top of the innovations, not twisted when dry, 



me Mjunj-csi uiigiu green, me oiaer curty vellow, 1.5-2.0 mm. 



long, 0.60-0.75 mm. wide, carinate concave, ovate- to ob- 

 ovate-lanceolate, the lower shorter, the upper narrower, all 



