202 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



ULOTA,! p. i6o. 



I. Leaves rigid, not crispate when dry. 



[TT. Xtrummondii may be sought here.] 



Costa percurrent U. Hutcbinsiae,^ 163. 



Costa ceasing below apex U. Barclay!, 164. 



II. Leaves crispate when dry. 



Capsule not constricted below the mouth when dry. 



Costate only at the mouth U. Ludwigii, 161. 



Costate for its whole length. 

 Stems creeping, leaves slightly crispate, cilia U. Drummondii, 161. 

 Stems not creeping, leaves strongly crispate, cilia present. 

 Capsule short oval, neck short. 

 Upper leaves tipped with gemmae . . U. phyllantha, 163. 

 Upper leaves not tipped with gemmae . . U. Bruchii,' 162. 

 Capsule cylindric, neck long . . . U. maritinia,t 211' 



Capsule constricted below the mouth when dry. 

 Cells uniform throughout the leaf . . U. megalospora,^ 210. 



Cells different at the angles. 

 Teeth lacunose at the apex .... U. curvifolia,* 161. 

 Teeth not lacunose. 

 Neck very long, teeth confluent ... TJ. crispa,' 162. 



Neck shorter, teeth separated at apex . . . U. crispula, 163. 



1 It seems best, while retaining for convenience the generic name Ulota (without ex- 

 pressing any opinion as to its validity), to utilize Mrs. Britton's careful study of our 

 American species. The nomenclature used is also derived in part from her paper in 

 BuU. Torr. Hot. Club 21: 65-76. 1894. 



* See Appendix, no. 2ia. 



s From the description given (Mac. Cat. 82) I am unable to separate U, obtusiuscula 

 C. M. & Kindb. 



* Renauld and Cardot think that U. maritima and Z7. phyllantha resemble each other 

 so closely that TJ. maritima should not stand as a distinct species. 



6 Including U. subulata and U. subulifolia C. M. & Kindb., Mac. Cat. 82, sec. Eliz. G* 

 Britton. 



'Including U. Americana Mitt., Man. 162, and probably U. scahrida Kindb., Mac. 

 Cat. 83. (E. G. B.) 



' Including U. camptopoda and U. conneclens Kindb., Mac. Cat. 85. (E. G. B.) 



