12 
tenellum, but agree in every way with what we have been calling 
O. strangulatum (Beauv.?) Sull. We have recently received from 
S. B. Parish specimens collected in California, which do agree 
with the descriptions and specimens in all but the cilia, and they 
are not papillose as Limpricht déscribed them. O. ¢enellumis one — 
of the few species of Orthotrichum, which have the stomata in the 
neck of the capsule and not around or above the base of the 
sporesac, and hence it is readily recognized. 
ORTHOTRICHUM PUMILUM, AMERICANUM Vent. Musc. Gall. 180 
(1887). 
Orthotrichum pumilum Sw. fide Austin Musci App. 165 (1870). 
O. fallax Sw. fide Austin, Bull. Torr. Bot. Club, 6: 344 (1879). 
We have examined the specimens in our set of Austin’s Musci 
Appalachiani, and compared his specimens with European speci- _ 
mens of O. pumilum. They are not that species, and we 
have not yet been able to find the specimens that Venturi _ 
referred as a variety to O. pumilum. The figure given by 
him indicates that his capsules were much shorter than any 
European specimens (T. xlix. 15a), and from the following descrip- 
tion it would seem as if he had reference to O. Ohioense, which I 
find mixed with our specimens. 
“ Var. Americanum : Tufts small, lax, soft ; leaves almost with- 
out papille, capsule with 8 bands, composed of two series of rec- 
tangular cells, feebly differentiated, teeth 8, obtuse perforate along 
the median line, finely papillose.” 
I find that Austin was right in citing his 165 as O. fallax Sch. 
(non Sw.) as most of it is that species, and may be readily recog- 
nized by its short capsules with abrupt neck immersed in the. 
ochrea, and serrulate leaves. The perforate teeth of O. Ohioense 
_ gave rise to a manuscript name in Austin’s herbarium, O. perfora- 
zum, which he afterwards published as QO. citrinum. Sullivant 
figured O. Ohioense with entire teeth. 
ORTHOTRICHUM OHIOENSE Sull. & Lesq. Musci Bor. Am. Ed. 2, | 
181. 
Orthotrichum citrinum Aust. Musci App. 170 (1870). 
Orthotrichum Ohioense var. citrinum (Aust.) 33 & J. Man. 17d ; 
(1884), 
At first sight it would seem desirable to iaiibals O. citrinum 
