Evans: Notes ON GENUS HERBERTA Zek; 
1843, A. Gray & W. S. Sullivant (distributed, as Schisma juniperi- 
num, in Sullivant’s Muse. Alleg. 258, and listed by Sullivant, as 
Sendinera juniperina, in A. Gray, Man. 689. 1848); top of 
Black Mountain, June, 1850, L. Lesquereux; Grandfather Moun- 
tain, August, 1891, J. K. Small 32 (also distributed, as H. adunca, 
in Underwood & Cook’s Hep. Amer. 126); Grandfather Mountain, 
September, 1901, G. F. Atkinson 11420, 11501 (listed by Andrews, 
as H. adunca, in Bryologist 17: 59. 1914); near Shulls Mills, 
Blue Ridge Mountains, September, 1901, G. F. Atkinson 12054 
(listed by Andrews, /.c.). 
Dr. Small’s specimen from North Carolina, No. 32, may be 
designated the type. 
Two additional records for H. adunca from the eastern United 
States may likewise be noted, namely: Carbon County, Pennsyl- 
vania, E. A. Rau (listed by Porter in Cat. Bryoph. & Pteridoph. 
Pennsylvania 9g. 1904), and mountains of western North Carolina, 
1907, A. J. Grout (listed by Grout in Bryologist 12: 54. 1909). 
In all probability these records were based on H. tenuis. 
The present species is closely related to H. Hutchinsiae but is 
considerably smaller. Although at first sight the small size might 
appear to be due to poor development, the study of a large series of 
specimens from many localities shows pretty conclusively that 
this is not the case. The size is of course subject to more or less 
variation, as in all species of Herberta, but the measurements of 
the leaves given in the description represent a fair average of the 
more robust plants studied, and are only about two thirds as 
great as the corresponding measurements in H. Hutchinsiae.. The 
difference in size is brought out with especial clearness by counting 
the width of the basal portion in cells between the vitta and the 
margin. In H. Hutchinsiae such a count would give from five to 
seven cells; in H. tenuis from three to five cells. Aside from the 
difference in size the slightly curved or straight divisions in H. 
tenuis and the thinner cell-walls will distinguish the species from 
H. Hutchinsiae, where the divisions are normally strongly curved 
and the thickening of the cell-walls much more distinctly marked. 
The basal teeth in H. tenuis, although an inconstant feature, 
deserve a few words of comment. When they occur there may 
be one or, rarely, two teeth on each side, and the underleaves tend 
