144 
appear to be inflated and protruding in the middle part of the leaf. 
In the light of later study this species seems to be more allied to 
the group of O. Macounii than to that of O. levigatum, and may 
possibly antedate one of the recent new ones from the Pacific 
Coast. 
Type locality, on rocks, Falls of the Yosemite, Bolander. 
Kindberg cites Macoun’s numbers 240 and 289 as this species, bs Be, 
we have not seen the specimens. It is to be hoped any botanists 
visiting the Falls of the Yosemite will try to collect this species 
again. 
III. Group or O. Macounn. 
(Group of O. stenocarpum Vent. Hedwigia, 32: 271, 1893). 
Dr. Venturi includes in this group three very closely allied | 
species, O. stenocarpum, O. Roellii and O. Schlotthauert, which he 
says form a new type of the genus and a connecting link between 
Orthotrichum and the species of U/ota with straight leaves, like U. 
Hutchinsi@, which they closely resemble in their habitat, dark — 
green dense growth and long exserted capsules. The bell-shaped, 
entire calyptra differs from that of Ulota, however. He enters 
into a long discussion of generic differences and suggests other 
lines of classification for the species of these two genera based on 
the stomata, etc. 
14. OrTaorricnum Macounm Austin, Bull. Torr. Bot. Club, 6: 343 
(1879). Orthotrichum stenocarpum Vent. Bot. Cent. 44: 389: : 
(1890). Hedwigia 32: 221 (1893), non Bridel Bryol. Ua . 
274 (1826). ae 
Austin’s description was published five years before the Manual 
was issued and listed in Rau and Hervey’s Catalogue in 1880, yet 
it is not to be found in the Manual, nor in Barnes’ Key nor ® 
Renauld and Cardot’s Catalogue. His species is a good one, a 
resented by fine specimens, and compared critically with authentic 5 
specimens of its nearest ally at the time it was published, 0. King 
anum, to which it is related by its superficial stomata, exserte : 
cylindric capsule, perfectly smooth when dry, with a long tapering 
neck. The upper cells of the leaves also are large and bluntly 
papillose as in that species. The following are Austin’s remat 
_on the two species. ' | ee 
