- 43 - 
in western Trans-Caucasia. I gathered it in Svanetia in flower ; Brotherus 
in fruit. The species is given as rare in Scandinavia and from there leaps 
over to northern North America, is however, absent in the Alps and in the 
rest of Europe. Should the Scandinavian station be destroyed, the case of 
Mnium ciliaressriW be exactly identical with Leskea Austini and Exobasi- 
dium discoideumP Thus Dr. Levier. 
His closing words characterize fairly well the typical moss student’s atti- 
tude. “ Bryology has so far furnished precious little toward the evolutional 
history of the world floras ; specialists are so absorbed in microscopic work 
and ‘ areolation ’ that they find no time to look beyond.” 
A note by me in the Plant World, Oct., 1901, showing the unusual dis- 
tribution of Claytonia chamissoi , Coscinodon Rani , C. Wrightii , Ditrichum 
fiexicaule brevifolium, Grimmia teretinervis, Weber a proligera and 
Weisia Wimmeriana: another note in the Botanical Gazette, Aug., 1900, 
establishing the occurrence in the difficultly accessible mountains of N. W. 
Montana of several European alpine species such as Grimmia mollis , G. 
subsulcata, Hypnum fiuitans brachydictyo?i , H. ochraceum uncinatum, 
Webera carinata: the report on another moss from this Montana collection 
in the Bryologist, April, 1901, viz. Hypnum Bestii, which according to M. 
Renauld occurs in but slightly modified form in the Pyrenees (var. Pyrenai- 
cum Ren.): a note in Asa Gray Bulletin, Oct., 1900, on the occurrence of 
Poly trichum Jensenii Hagen, in the Yellowstone National Park: and a brief 
note on some mosses new to Alaska in the Bryologist, March, 1902, p. 30 
— seem now to have an added interest. Winona, Minn. 
A CALL FOR ASSISTANCE. 
It is my purpose to make as complete as possible the series of Acrocarpi 
Boreali-Americani which I have begun to issue the first of this year, and of 
which three fascicles. Nos. 1-75, are distributed. I ask for the co-operation 
of all moss students in the various parts of the United States. I shall offer 
suitable remuneration to any experienced collector, either in mosses or cash, 
for sets of forty to fifty good specimens of such species as are outside of my 
reach. And I invite correspondence for this purpose. 
After the first century of this series is complete, I propose to publish a 
pamphlet summing up the criticisms and corrections, which I herewith 
cordially elicit from all recipients, and it is my intention to publish with this 
series of notes a full list of all recipients with their addresses, believing that 
this will be an aid in the study of the mosses distributed, and in establish- 
ing a uniform understanding of critical and little understood species. 
May I be permitted to point out, in closing this note, that I am taking 
very great pains to avoid all mixtures. My task will be somewhat simpli- 
fied if those collecting for me will use due caution not to mix sods in the 
field. John M. Holzinger. 
