THE PLANTS OF THE PRIBILOF ISLANDS. 577 



Didymodon baden-powellii, Kindb. Ott. Nat., Vol. V, p. 179. 



Difi'ers from Didymodon ruhellus in the dioecious inflorescence, the blunt, conic, 

 very short lid, scarcely one-fifth of the capsule, and the distinctly dentate leaves (as 

 in Didymodon alpigenus, Vent.). The tufts are compact, about 2 cm. high, the leaves 

 revolute nearly all around, short-acuminate, the lower pale brown, perichetial ones 

 longer acuminate or subulate entire. The capsules are (unripe) more or less curved, 

 the pedicel pale red. 



St. Paul Island. (J. M. Macoun.) First collected in 1891 

 Desmatodon latifolius, Brid. ( 



St. Paul Island. (Palmer.) 

 Desmatodon systilius, Br. and Sch. 



St. Paul Island. (Dr. Merriam.) 



I have seen neither Mr. Palmei"'8 nor Dr. Merriam's specimens of Desmatodon, but 

 believe them to be both D, latifolius which D. systilius nearly approaches. D. latifo- 

 lius is common at Unalaska. 



Grimmia apocarpa, Hedw. 



On rocks, St. Paul Island. (J. M. Macoun.) 

 Racomitiium lanuginosum, Brid. 



On rocks, St. Paul Island. (Dr. Merriam; Palmer; J. M. Macoun.) 

 Racomitrium microcarpum, Brid. 



St. Paul Island. (Dr. Merriam.) Probably the next. 

 Racomitrium microcarpum, Brid., var. palmeri, Kindb.; Macoun, Cat. Can. Plants, Vol. VI, p. 267. 



Differs in the leaves being long-subulate, hairless, the upper cells longer and 

 more confluent, the alar ones large and rectangular, the capsule shorter pedicellate. 

 Differs also from the related Racomitrium sudeticum in the deeply cleft peristomial 

 teeth, the ilarrow leaf cells, etc. (Palmer; J. M. Macoun.) First collected by Mr. 

 Palmer in 1890. 

 Orthotriohum laevigatum, Zelt. 



Eocks, St. Paul Island. (Dr. Merriam; J. M. Macoun.) 

 Orthotriohum mioroplephare, Schimp. 



St. Paul Island. (Dr. Merriam.) 

 Tetraplodon mnioides, Br. and Sch. 



Wet banks, St. Paul Island. (Dr. Merriam; J. M. Macoun.) 

 Splachnum wormskioldii (Home.), Kindb. 



St. George Island. (J. M. Macoun.) 

 Bartramia ithyphylla, Brid. 



Crevices of" rocks, St. Paul Island. (Dr. Merriam ; J. M. Macoun.) 

 Bartramia pomiformis, Hedw. , 



St. Paul Island. (Palmer.) 

 Phllonotis fontana, Brid. 



St. Paul Island. (Dr. Merriam ; J. M. Macoun.) 

 5947_PT 3 -37 



