OP ARTS AND SCIENCES. 133 



X. 



DESCRIPTIONS OF SOME NEW SPECIES OF NORTH 

 AMERICAN MOSSES. 



By Leo Lesquereux and Thomas P. James. 

 (With a Supplement by W. P. Schimper.) 



Presented February 12th, 1879. 



The new species of mosses here described have been received by us 

 from various sources since the death of Mr. Sullivant and the publi- 

 cation of the SujDplement to the Icones Muscorum. On a recent 

 visit by Mr. James to Europe, he took with him not only specimens 

 of these species, but also of many of those recently described as new 

 in the scientific periodicals of this country, for the purpose of criti- 

 cally re-examining the whole in co-operation with Professor W. P. 

 Schimper, of Strasburg. This justly celebrated bryologist has cor- 

 dially given his assistance in this review, and therefore secured to 

 the description of our species a higher degree of authority. Our 

 grateful acknowledgments are most cordially offered to him for this 

 service, and also for the communication of the descriptions of some 

 new species of American mosses prepared by himself on specimens 

 derived from the rich and mixed materials of the well-known col- 

 lections of Drummond. 



Sphagnum Garberi. Planta magnitudine et habitu inter Sphag- 

 num molle et Sphagnum squarrosum, var. squarrulosum, ludens, viridis. 

 Caulis mollissimus : indusium corticale e stratis 3 cellularum laxarum 

 compositum ; cylindrum internum e cellulis extus minutis intus majo- 

 ribus leptodermicis omnibus hyalinis compositum. 



Folia caulina mediocriter magna deltoideo-ovata, apice subcucullata 

 et subintegra, ad angulos appendiculata integra ; cellulis omnibus hya- 

 linis majoribus, versus marginem vix angustatis, basin versus parce 

 fibrosis nee porosis, ad apicem fibrosis et pertusis. Ramuli patentes 

 breves vix incurvati squarroso-foliosi, penduli parum elongati imbri- 

 cato-foliosi. Folia ramulorum patentium e basi concava imbricante 

 patula valde concava, apice truncato dentata, haud marginata, cellulis 



