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SOME ADDITIONS TO THE MOSS FLORA OF THE UNITED STATES 
John M, Holzinger 
Andreaea Blyttji B & S. This moss was collected by Prof. J. B. 
Flett on Mount Tacoma (Mt. Rainier) on July 25, 1905, at an altitude of 
5500 ft. 
Oligotrichum hercynicum DC. This was also collected by Prof. Flett 
300 ft. higher up on Mount Tacoma, i. e., 5800 ft. 
Didymodon flexifolius (Dicks ) Hook. & Taylor. This moss was col- 
lected by Dr. A. J. Grout, on Chestnut Bald, North Carolina, Sept. 4, 1907, 
at an altitude of 5900 It. Mr. R. S. Williams, of the New York Botanical 
Garden, has kindly verified this determination of Dr. Grout’s plant. This 
moss is also new to North America and will be distributed in my next fasci- 
cle of “Musci Acrocarpi Boreali-Americani.” (Just received as No. 
264. Ed. ) 
Grimmia Agassizii L. & J. This plant agrees with “ Canadian Mosses” 
No. 80a, determined by Dr. N. C. Kindberg. It does not agree fully with the 
description of Griminia Agassizii in Lesquereux & James’ Manual, p. 136, 
in the following points; Leaves are not appressed when dry, but slightly 
curled at top; are not shining, blackish (except those very old), linear lanceo- 
late from a slightly broader base, obtuse and coarsely sparingly dentate at 
the apex, but are rather dull light or pale green (when fresh), the lower very 
narrowly triangular, the comal leaves rapidly becoming twice their length, 
gradually widening from the narrow base to about the middle, then narrow- 
ing more abruptly to a slender subulate ape^ which is entered, but not 
reached, by the thick terete costa. There are no teeth at all on the leaves of 
either the Canadian or this plant; but what might be taken for teeth on 
leaves are rather large low papillae which cover both surfaces in the upper 
half of the leaf. The leaves are soft and brittle, and are easily torn. When 
mounted in water they lie quite flat. For a third to half the length from the 
base the leaf cells are elongated-rectangular, and pellucid, becoming shorter 
and isodiametric as they meet the denser squarish cells of the upper part of 
the leaf. But the most distinctive feature of this moss is the fact that the 
lamina is for most of its length bistratose, becoming only below the middle 
sporadically unistratose. 
The capsule, dry or wet, is perfectly smooth and a transparent pale 
yellow, short-oval, surmounted by a short-beaked operculum, the beak being 
as long as the operculum is wide. The vaginule, lacking paraphyses. 
