200 BULLETIN OP THE UNIVERSITY OE WISCONSIN. 



Costa not lamellose. 

 Leaves with quadrate cells at tte base, decurrent and 



semi-aiiricled B. depressnm, liS, 



Leaves with linear cells at the base, neither decurrent 

 nor auricled. 

 Obtuse. 

 Perichsetial leaves costate, seta long . . B. acicnlare, 148, 

 Perichffitial leaves ecostate, seta short . . E. NeTii, 148. 

 Acute. 

 Capsule oblong, not striate, teeth orange E. Maconnii,^ 19S. 



Capsule oval, striate or plicate when dry, teeth 



purple E. robnstifolinm, 195. 



1 1 . Branches fasciculate, 



A. Leaves muticous. 



Cells elongated above E. fascicnlare, 150. 



Cells quadratic above. 

 Costa perciurent. 



licaf cells smooth E. yarium,* 150. 



Leaf cells rough, simple papillae over the lumen E. canescens, 151. 

 Costa vanishing below apex, cells with geminate pa- 

 pillae over the partitions . . . . B. protensnm, 1911, 



B. Leaves with a hyaline point. 



Cells linear at least above. 



Hyaline point not papillose . . . . E. microcarpnm,' 150. 



Hyaline point strongly erose-serrate and papillose E. lannglnosiuil,* 151. 

 Cells quadratic above. 



[IB. tnicropua may be soti^ht here.J 



Strongly papillose on both sides . . . . E. canescens,' 151. 

 Smooth or nearly so. 

 Annulus broad. 

 Alar cells of leaf linear ... E. heterostichnm,' 149. 



1 J{. aUernatum C. M. & Eindb., described from barren specimens, seems to be refera- 

 ble to this species. See Appendix, no. 194. 



» je. Oreganum Hen. & Card., Bot Gaz. 13: 198. pU IS. 1S88, is this species (fide 3. Car- 

 dot in litt.) which seems to be ii. canescena luteseens L. & J. ; fide Mrs. E. G. Britton in 

 Utt. 



' See Appendix, no. 200. 



* See Appendix, no. 202, 



' See Appendix, nos, 203, 201 



• See Appendix, nos. 196-198. 



