THE BRYOLOGIST 



Vol. XV November 1912 No. 6 



THE HEPATIC AE OF THE SIXTH EDITION OF GRAY'S MANUAL 

 COMPARED WITH THE EXCHANGE LIST 



George Hall Conklin. 



Since the publication of the Sixth Edition of Gray's Manual in 1890, many 

 changes have occurred in the nomenclature of the Hepaticae as described by 

 Professor Underwood. In the recent Exchange List, compiled by Miss Caro- 

 line C. Haynes and issued by the Society, the known species from the United 

 States and Canada are given. The omission of many of the old names and the 

 addition of many new ones in this list is at once apparent. To meet the in- 

 quiries which have come to the writer, it was thought that a comparison of the 

 species in the two publications would be of some service to the students who 

 still refer to the Manual in the absence of other descriptive works. No at- 

 tempt is made to include the synonymy of all the species, nor to give all the 

 synonymy of each species mentioned. The sequence of the Manual is followed 

 for convenience. Dr. Evans has kindly corrected the errors in this survey of 

 recent hepatic literature. 



Frullania virginica Lehm. is now included under F. ehoracensis Gottsche as a 

 synonym. 



Frullania pennsylvanica Steph. is now Juhula pennsylvanica (Steph.) Evans. 



Frullania aeolotis Nees is a synonym of F. riparia Hampe. 



Frullania dilatata Nees. The American plant is distinct from the European 

 F. dilatata (L.) Dumort., and is now known as F. Brittoniae Evans. 



Frullania fragilifolia Tayl. The American plant is distinct from the European 

 species of this name and is now known as F. Selwyniana Pears. 



Juhula Hutchinsiae Dumort. var. Sullivantii Spruce, is a synonym of /. penn- 

 sylvanica (Steph.) Evans. 



Lejeunea clypeata Sulliv. is now Leucolejeunea clypeata (Schwein.) Evans. 



Lejeunea serpyllifolia Libert var. americana Lindb., is a synonym of L. cavi- 

 folia (Ehrh.) Lindb. so far as plants of the Manual range are concerned. 

 Plants of the southern United States, which Lindberg referred to his va- 

 riety americana, belong to L. fiava (Swartz) Nees. 



Lejeunea lucens Tayl. is a synonym of Microlejeunea laetevirens (Nees & Mont.) 

 Evans. 



Lejeunea calcarea Libert. he American plant is distinct from the European 

 Cololejeunea calcare Libert) Schiffn. and is now known as Cololejeunea 

 Biddlecomiae (Aus< Evans. 



Porella Thuja Lindb. ie American plant is distinct from the European Po- 



The September Bryologist was issued September 19, 1912. 



