Reprinted from Rhodora, Vol. 25, Nos. 293 & 294. May-June, 1923. 



LIBRARY 



NEW YOtJK 

 BOTANICAL 



OAkUFN 



NOTES ON NEW ENGLAND HEPATICAE — XVII. 1 

 Alexander W. Evans. 



In the fifth series of these Notes 2 the writer recognized the genus 

 Ricciella A. Br. as valid, separating it from Riccia L. on the basis of 

 certain anatomical differences in the thallus. It has since been demon- 

 strated that these differences are inconstant and that the genus 

 Ricciella ought not to be maintained. 3 The four New England 

 species referred to Ricciella should therefore be known as Riccia 

 crystallina L., Riccia fiuitans L., Riccia membranacea Gottsche & 

 Lindenb. and Riccia Sullivantii Aust. 



Another genus based on equally vague anatomical characters is 

 Neesiella Schiffn., of which two species, N. pilosa (Hornem.) Schiffn. 



1 Contribution from the Osborn Botanical Laboratory. 



2 Rhodora 9: 56. 1907. 



» See Evans, Bryologist 25: 8\. 1922, See also Howe, North Am. Flora 14: 11. 

 1923. 



A 





