1907] ^ Evans,— Notes on New England Hepaticae,—V [67 
straight or slightly convex sides. The underleaves are relatively 
large and frequently imbricated, averaging about 0.45 mm. in length 
and from 0.45-0.6 mm. in width. They are broadly orbicular and 
bifid to the middle or beyond with an acute sinus and acute or obtuse 
lobes. Sometimes the lobes are entire but it is more usual for them 
to bear a blunt supplementary tooth on the outside, and occasionally 
a second tooth of this character is to be observed. ‘The inflorescence 
seems to be constantly dioicous. In distinguishing the species from 
C. Trichomanis the small size, the variable leaves, the small leaf-cells 
with trigones, and the deeply bifid underleaves afford the most trust- 
worthy differential characters. The peculiar habitat of the plant 
should also be kept in mind. 
8. CALYPOGEIA SULLIVANTII Aust. Hep. Bor.-Amer. 74b. 1873. 
Kantia Sullivantii Underw. Bot. Gaz. 14: 196. 1889. The type 
material of C. Sullivantii came from Alabama but the species was 
also known to Austin from New Jersey. It has since been recorded 
from Massachusetts, Rhode Island, and Connecticut and the writer 
has lately received specimens from North Carolina and Arkansas. 
It evidently replaces the European C. arguta in North America and 
is very different from the other species noted in the present paper. 
Since the published descriptions are incomplete, a fuller account of 
the species, with figures, may perhaps be of service. 
The plants grow scattered or in very loose mats and vary in color 
from a pale yellowish green in exposed localities to a deeper green in 
the shade. ‘The stems are prostrate and sparingly branched. They 
are somewhat flattened and show a distinction between the cortex, 
which is composed of a single layer of enlarged cells, and the median 
region, which is made up of a mass of smaller cells about four cells 
wide and three cells thick. The cortical cells are commonly arranged 
in ten longitudinal rows, four antical, four postical, and one lateral on 
each side (f. 3). The postical cells are a little larger than the antical, 
but the lateral cells surpass both in size, measuring from 45-70 » in 
length and about 45 x in width. They give the stem the appearance 
of being narrowly winged. The leaves are attached to these long 
cortical cells for about three fourths their width, the line of insertion 
curving at its apical end to the middle of the antical surface of the 
stem (f. 4). A similar stem-structure is found in C. arguta and also in 
the Hawaiian C. bifurca Aust.;' it bears a strong resemblance to the 
1 Proc. Acad. Nat. Sci. Phil. 1869: 223. See also C. M. Cooke, Jr., Trans, Conn. Acad, 
12: 26. pl. 9, f. 1-10. 1904. 
