1896.) North American Species of Plagiochila. Ig! 
This species differs from P. Ludoviciana in its smaller size, 
inits manner of branching, and in the shape of its leaves, 
which are not widened out and reflexed at the postical base 
and whose antical margins are not strongly arched. It is near 
P. dubia Lindenb. & Gottsche as figured by Gottsche,** but 
the leaves are more imbricated and more deeply toothed than 
he represents and the perianth has longer cilia. 
6: Plagiochila Sullivantii Gottsche MS.—Plate XV. figs. 
wW-ar and XVI. figs. 1-3. 
P. spinulosa Sull. Musci Alleg. . 279 [not (Dicks.) Dum.]. 
Dioicous; growing in depressed tufts, glossy, bright green 
Varying to yellowish green and becoming brownish with age; 
stems simple or sparingly branched; leaves distant or subim- 
bricated, widely spreading, slightly convex, varying in shape 
from narrowly ovate to obovate, antical margin slightly de- 
current, straight or a little curved, entire, subreflexed towards 
the base, postical margin short-decurrent, arched, usually en- 
lite at the base but soon becoming incised-dentate, apex 
broad, cither coarsely dentate or bifid with pointed, entire or 
denticulate lobes; leaf-cells polygonal, thin-walled and scarcely 
thickened at the angles; underleaves minute, split to the base 
Into severa] capillary lobes. ot 
as Eby 2-5 to 1.5™ long, 0.2™™ in diameter; saves 1.2 
a 0.5"" wide; leaf-cells in middle of leaf 0.019™ in diam- 
Se of rivulets, Alleghany mountains, Sullivant. ve 
ee rocks; New Hampshire: White mountains, James; 
pe ecue: Beacon Falls, Evans; Branford, Eaton; tenn 
Sylvania: Canadensis, Mrs. Britton; North Carolina, in Lin- 
ae herbarium. Distributed as P. spinulosa in Musci 
in ”. 219, in Hep. Bor.-Amer. 2. g, and in Hep. Amer. 
Sa years ago Mr. W. H. Pearson of Manchester, et 9 
the i. tPressed the opinion that this species was a ae te 
Winaea © P. spinulosa, and a comparison of the we we dts 
ame en that such was indeed the case. I had hop aati 
the G. Z but upon aaa g 
Na: tel herbarium, I found that it had already been 
‘th deat anuscript by that author. 
en 
b ‘ d examined a spec- 
uted by Sullivant, Gottsche ha ngermannia 
from the Lindenberg herbarium (labeled 7u 
la M 
ex, Levermosser pl. 2. 1863. 
