88. . Rhodora [Marcu 
NOTES ON NEW ENGLAND HEPATICAE, —V. 
ALEXANDER W. EVANS. 
(Plate 73.) 
Of the species noted below the first three are introduced for nomen- 
clatorial reasons. ‘The paper also records additions to the hepatic 
flora of each New England state except Rhode Island. ‘The majority 
of these additions belong to either Lophozia or Calypogeia, one species 
in the latter genus being elevated from varietal rank. For the sake 
of comparison the two species of Calypogeia already known from 
New England are also discussed. The reasoris for discarding the 
generic name Kantia in favor of Calypogeia are stated by the writer 
in another connection." 
1. Ricciella Sullivantii (Aust.) comb. nov. Riccia Sullivantii 
Aust. Proc. Acad. Nat. Sci. Phil. 1869: 233. Riccia fluitans, var. 
Sullivantii Aust.; Underwood, Bull. Illinois State Lab. Nat. Hist. 
2: 28. 1884. Riccia Huebeneriana Underw. Bot. Gazette 19: 
276. 1894 (not Lindenb.). The genus Ricciella was proposed by 
A. Braun in 1821? for the reception of Riccia fluitans L. and Riccia 
canaliculata Hoffm., both of which are now considered forms of the 
same species. It was based on the fact that the capsules protruded 
from the lower surface of the thallus, instead of from the upper, as in 
more typical species of Riccia. For a long time it received but*slight 
recognition, although both ‘Trevisan and Dumortier accepted it with- 
out question. It has also been accepted by Stephani, at first as a 
genus and afterwards as a subgenus under Riccia.2 Instead, however, 
of relying upon the original characters of Braun, he bases his division 
on differences in the structure of the thallus. In Riccia proper, as he 
defines it, the photosynthetic layer consists of rows of cells extending 
at right angles to the epidermis; these are loosely connected longi- 
tudinally and enclose air chambers in the form of narrow canals. 
In Riecciella the air chambers are more irregular and are separated by 
plates of cells. Warnstorf * adopts Ricciella as a genus on the basis of 
Stephani's characterization, a procedure which seems to be entirely 
! Bryologist 10: 24-30. 1907. 
? Flora 4: 756. 1821. 
3 Bull. de l'Herb. Boissier I. 6: 361. 1898. 
4 Kryptogamenfl. der Mark Brandenburg 1: 80. 1903. 
