D 
i 
= 
Eod M. os s. Led 
1914] Evans,— Notes on New England Hepaticae,— XI 75 
apparent, and a false nerve is never differentiated as in D. albicans. 
The walls of the leaf-cells are slightly thickened, the trigones are 
small and often indistinct, and the cuticle is smooth or indistinctly 
roughened. The gemmae, which seem to be invariably present, are 
usually bicellular and vary in outline from oval to rhombic; they have 
thickened yellow walls and average about 28 X 14 u when well devel- 
oped. The inflorescence is dioicous, the male and female plants grow- 
ing separate. 
A very close ally of D. gymnostomophilum is the arctic D. incurvum 
Bryhn and Kaalaas,' known from North Lincoln, Ellesmere Land, and 
King Oscar Land. This species is of about the same size but is more 
deeply pigmented so that it often appears brown. The leaves are 
relatively broader, the ventral lobe being broader than long, and the 
dorsal lobe is usually obtuse. In the common D. apiculatum of the 
eastern United States, the inflorescence is autoicous, and both ventral 
and dorsal lobes are pointed. It is further distinguished by the fact 
that the margins of the lobes are often denticulate or, in the apical 
portion, even dentate, although entire lobes also occur. 'The cells 
are a trifle smaller, averaging about 18 X 12 u in the middle of the 
ventral lobe. 
Small sterile forms of Scapania curta (Mart.) Dumort. also resemble 
D. gymnostomophilum in certain respects. Usually, however, the 
margins of the lobes are more or less toothed, and the leaf-cells are a 
little larger, the marginal cells averaging about 17y in diameter, and 
the median cells about 22 u. The latter, moreover, tend to be more 
isodiametric and show no indications of an arrangement in longi- 
tudinal rows. The trigones in S. curta are often conspicuous and the 
gemmae, although bicellular, average only about 20X9 u, being thus 
considerably smaller than in the Diplophyllum. 
The additions to local state floras, not already mentioned in the 
preceding pages, are as follows: — 
For Maine. Metzgeria pubescens, Cephaloziella Sullivantii, Chilo- 
scyphus rivularis, Jungermannia cordifolia, and Lophozia Kaurini; 
Round Mountain Lake and vicinity, Franklin County (Miss Lorenz). 
For New Hampshire. Calypogeia Sullivantii; Passaconaway (Miss 
Elizabeth Welsh). Cephalozia Francisci and Lophozia confertifolia; 
Waterville (Miss Lorenz). 
1 Bryhn, Rep. Second Norwegian Arctic Exped. in the ‘‘Fram’’ 11: 48. 1906. 
