1906] Evans, Notes on New England Hepaticae,— IV 41 



tions go they might easily be inchuled in the cycle of L. hderophyUa, 

 but of course this could only be decided from the study of the types. 



The reduction of L. Am-tini and L. Maroimii to synonymy and the 

 attempt to maintain as distinct such a species as Marsupella media' is 

 perhaps open to criticism. It has just been shown that L. Anstini 

 passes into L. hrterophylla by intergrading forms, but it seems to be 

 also true that there are intermediate conditions between M. media and 

 M. sphacelata. It must be further acknowledged that there is more 

 difference between an ideal L. Anstini, if such an expression be allowed, 

 and an ideal L. MerophyUa than there is between M. media and M. 

 sphacelata. The two cases, however, are not entirely parallel. Typi- 

 cal specimens of M. media actually occur and are distinguished from 

 typical specimens of M. sphacelata by slight but constant characters. 

 In L. heterophyUa, on the other hand, it is sometimes possible to find 

 a whole series of gradations exhibited by a single individual. 



5. ScAi'ANiA DENTATA Dumort. Rccueil d'Obs. sur les Jung. 14. 

 1835. Jungermannia nemowsa, var. purpurascens Hook. Brit. Jung. 

 pi. 21, /. 16. 1816. Radula dentata Dumort. Syll. Jung. 40. 1831. 

 Scapania Oakesi Aust. Bull. Torrey Club 3: 10. 1872. S. purpur- 

 ascens Tayl.; Pearson, Hep. British Isles 225. pL 00. 1900. New 

 Hampshire: White Mountains (IF. Oakes); :\It. Washington (.1. W . 

 E.). In the writer's Preliminary List of New England Hepaticae' 

 no mention is made of Scapania Oakesi, although this species is defi- 

 nitely recorded from the White ^Mountains in the sixth edition of (J ray's 

 TVlanual. The cause of the omission was the uncertainty which existed 

 at that time in regard to the plant. Austin based his species on a 

 somewhatTuncertain character, the carinal teeth on the uppermost 

 leaves. This character has since been found to occur in other species, 

 so that it "cannot he relied upon. The specimens which Austin dis- 

 tributed in his Hep. Bor.-Amer. 14, have recently been studied by 

 Mliller, who gives the results of the examination in his valuable "Mon- 

 ographie der Lebermoosgattung Scapania Dum."=' He finds among 

 these specimens three distinct forms, one referable to S. xindulata, 

 another to S. dentata and the third to S. nemorosa, but concludes that 

 the second probably served as the type of Austin's species, which may 

 therefore be reduced to synonymy. 



liRHODORA 6: 167. 1904. 



2 Rhodora 5: 170-173. 1903. 



•■'INova Acta Acad.fCaes. Leop. Carol. 83: 1-312. 52 pi. 1905. 



