232 BULLETIN OP THE UNIVERSITY OF WISCONSIN. 



ORTHOTHECIUM, p. 315. 



Leaves lanceolate, long and narrowly acuminate . 0. rufescens, 315. 

 Leaves exactly ovate, apex flexuous, not plicate . 0. rubellum, 315. 

 Leaves lanceolate to ovate lanceolate, plicate, not acumi- 

 nate 0. chryscum, 316. 



Leaves long subulate 0. intricatum, 4.28* 



PSEUDOLESKEA, 1 p. 319. 



Costa percurrent, leaves serrate at apex . . P. rigescens, 2 320. 



Costa short, double, or none, leaves entire. 

 Alar cells transversely elongated . . . .P. tectorum, 485* 



Alar cells quadrate P. malacoclada, 436. 



Costa single, vanishing below apex, leaves serrate and entire. 

 Leaves long decurrent ..... P. falcicuspis, 433. 

 Leaves not decurrent. 



Lanceolate from an ovate base ... P. atroYirens, 8 319. 

 Narrowly lanceolate P. stenophylla, 434. 



P. oligoclada Lindb., has been reduced by Ren. & Card, to P. atrovi- 

 rens Sch. Hypnum radicosum Mitt, is identified by them with P. riges- 

 cens Lindb. to which P. sciuroides Kindb. has also been added as a syn- 

 onym. See Mac. Cat. 180, and Ren. & Card. Revue Bryol. 20: 15. 1893. 



HETEROCLADIUM, p. 320. 



Leaves papillose. 



Coarsely toothed, mouth of capsule bordered by three 



rows of transversely elongated cells . H. heteroptemm, 437. 

 Faintly serrulate, mouth of capsule not bordered H. dimorphum, 321. 

 Denticulate above the middle. 



Leaves dimorphous and faintly papillose H. Yancouveriense, 438. 

 Leaves homomorphous and strongly papillose H. frullaniopsis, 439. 

 Leaves smooth. 



Auriculate and squarrose . . . . H. aberrans, 440. 



Not auriculate, divergent H. procurrens, 321. 



1 P. catenulatum Brid. has never been found in America ; the locality given in L. & J. 

 Man. 320, as Mt. Ingleborough, New York, is York, England. 



2 See also Appendix, no. 432. 



3 See Appendix, nos. 429-431. 



