— 105— 
Wain. Reduced states have been mistaken for Cl. caespiticia (Pers.) Flk., 
Cl. (Hag ) Willd,, and a specimen without visible thallus reposing 
in my herbarium was so named by its collector (and he was no novice), 
Baeomyces rosus. Cl. mitrula is represented in my herbarium by forty-seven 
specimens, from as many different localities. I possess examples from 
Texas, Nebraska, Iowa and No. Dakota as a western limit, and every State 
on the Atlantic seaboard from Florida to Massachusetts and from many 
stations within the area thus bounded. I have not found it in Maine, and it 
seems to be rare in British America. Cuban specimens examined, but 
identified by others, have an enormously developed thallus and represent an 
extreme variation for the plant deserving reeognition by name. 
Roekland, Maine. 
CHARLES R. BARNES AND JULIUS ROLL’S COLLECTION OF 
MOSSES IN NORTH AMERICA. 
By E. J. Hill. 
In the obituary notice of Charles Reed Barnes in the May number of 
The Bryologist most of his contributions to American bryology are 
mentioned. But there is one I have not seen noticed in sueh a eonnection. 
This, with additional bibliographical and historical matter, gives the occa- 
sion for the following statements. 
In 1888 and 1889 a collecting trip to North America was made by Dr. 
Julius Roll, of Darmstadt, Germany. It was under the patronage of Dr. G. 
Dieck, proprietor of a sehool of forestry at Zdsehen, in Merseburg. At New 
Bremen, Ohio, he was joined by Mr. C. Purpus, and in Manitoba by Mr. M. 
Riss These colleeted insects and the higher plants. Dr. Roll giving his time 
chiefly to the cryptogams, the mosses especially. The states in whieh 
collections were made are New York, New Jersey, Indiana, Illinois, Wiscon- 
sin, Minnesota, North Dakota, Montana, Wyoming, Idaho, Oregon, Wash- 
ington and British Columbia. New York is scarcely cited in the published 
account; New Jersey at New Durham, mainly for sphagna, in which Roll is 
a specialist. The collecting ground in Indiana and Illinois is the region 
bordering Lake Michigan from the dune locality at its south end, whose 
peaty areas abound in sphagna, to the dune locality north of Waukegan, 111. 
In Wisconsin, Milwaukee, and Princeton on Fox River were the main 
centers for collecting. It is stated that most attention was bestowed on the 
west coast and the Cascade Mountains (Vancouver Island, Washington and 
Oregon), the Rocky Mountains in Idaho, Wyoming and Montana, and the 
region of the Great Lakes in Indiana, Illinois and Wisconsin, the greater 
part of citations of localities being from these areas. 
Eighty-one species of Lichens were collected, assigned to Dr. J. Muller, 
of Genf, and published in the Regensburg Flora, 1889. The new species, 
varieties and forms of mosses were first published in the Botanisches 
Centralblatt of Uhlworm and Kiohl, Vols. 44 and 45, 1890, 1891, under the 
general title: Vorlaufige Mittheilungen fiber die von mir im Jahre 1888, in 
