A. W. Evans — IS^orth American Sj^ecies of Frullania. 35 



base, decurved at the rounded apex, entire ; lobule close to the stem, 

 galeate, inflated, sometimes more distant and explanate ; stylus 

 minute, subulate : underleaves orbicular-obovate, bifid about one- 

 fourth with obtuse or subacute lobes and sinus, entire or repand-den- 

 tate on the margins ; leaf-cells of lobe rather thick-walled with con- 

 spicuous trigones and intermediate thickenings; ? inflorescence ter- 

 minal on the stem or a main branch ; bvacts in two or three pairs, 

 unequally bifid, the lobe ovate, rounded at the apex, entire, lobule 

 shorter and narrower, acute, bearing a small tooth or stylus on the 

 inner edge below the middle, otherwise entire, bracteole free from 

 the bracts, narrowly ovate, bifid about one-third with acute lobes and 

 sinus, subdentate toward base ; perianth and <J plant not seen. 



New Mexico (Wright). 



Frullania Wrightii, known only from its type specimens, is appar- 

 ently a form of F. riparia. It is impossible to be sure of this, how- 

 ever, until better developed plants are found, as there are slight 

 differences between the two in areolation, underleaves, and involucre. 



In conclusion I would express my thanks to Professor Underwood 

 for the loan of his valuable collection of FrullanicB, to Herr Stephani 

 for helpful notes, drawings and specimens, to Dr. Robinson for ac- 

 cess to several of Taylor's and Sullivant's types, and to Mr. Howe and 

 others for specimens. 



Yale University. 



