250 



BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



Perichaetial leaves ecostate.^ 



Plicate ..... 

 Not plicate. 

 Foliage leaves strongly revolute 

 Foliage leaves concave 



H. plicatile, 394. 



H. revolntum.^ 566. 

 H. Seqnoieti, 392. 



H. ragosum, 388.-- 

 H. robnstnm, 388. 



H. lorenm, 410. 

 H. triquetrum,'' 409. " 

 H. squarrosnin,^ 409. 



HYLOCOMIUM,^ p. 409. 



Leaves secund. 

 Sharply serrate at apex, alar cells quadrate 

 Subserrate at apex, alar cells scarcely different 

 Leaves equally spreading. 

 Paraphyllia none. 

 Leaves sulcate. 

 Ecostate, leaf cells aU alike 

 Bicostate, leaf cells enlarged at the base 

 Leaves not sulcate ..... 

 Paraphyllia present. 

 Leaves with a long double costa and deeply sulcate H. nmbratnm, 407. 

 Leaves obscurely bicostate. 

 Paraphyllia pinnate, branches 2-3 pinnate H. splendeng, 407."^ 

 Paraphyllia minute, branching irregularly pin- 

 nate H. brevirostre, 408. - 



Leaves unicostate to middle, coarsely serrate . H. Oakesii, 408. 



i-JT. pseudo-fasiigiatum C. M. & Kindb., Appendix, no. 563, and U. pseudo-pratense 

 Kindb., Appendix no. 578, both described from sterile si)ecimens, fall here. 



' See also Appendix, no. 567. 



^Including Pleurozium L. & J. Man. 407. 



* See Appendix, no. 603. 



' See Appendix, no. 602. H. calvescens (Wils.) Lindb. is closely related to i?. squar- 

 osum and is ranked as a variety by Husnot: Muscol. GraD. 425. 



