THE PLANTS OF THE PRIBILOF ISLANDS. 577 



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



Differs from Didymodon rubellus 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 Sob. 



St. Paul Island. (Dr. Merriam.) 



I have seen neither Mr. Palmer's 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. 



Grrimmia apocarpa, Hedw. 



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



Racomitriuru lanugiuosum, 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 narrow leaf cells, etc. (Palmer; J. M. Macoun.) First collected by Mr. 

 Palmer in 1890. 



Orthotrichum laevigatum, Zelt. 



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

 Orthotrichum microplephare, Scbimp. 



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.) 

 Philonotis fontana, Brid. 



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

 5947— PT 3 37 



