196 
studying Macoun’s mosses, and has also succeeded in making 
another synonym, which is very suggestive of the most con- 
spicuous characteristic of our North American species. In the 
Ottawa Naturalist (4: 62, 1889) he described P. strangulatum 
Kindb., which later, in Macoun’s Catalogue (Part 6: 103, 1892) 
is referred to P. turbinatum C. M. (L. & J. Man. 198). The speci- 
mens from both localities cited in the catalogue have been sent 
to me by Prof. Macoun, mixed together in one packet, so that I 
cannot tell from which locality the large lax ones, which match 
Boll’s Texan specimens, were collected, but they are correctly 
referred to “P. turbinatum Miiller,” probably by Miiller himself, 
who has recently been verifying some of Kindberg’s determi- 
nations. soe 
P. platyphyllum Kindb. Macoun’s Cat., Part 6, 269 (1892). 
We have tried to get good specimens of this species, but : 
neither Prof. Macoun nor Mr. Fletcher have any but immature spect 
mens, and from the description it seems evident that the types — 
also were“ unripe.” Prof. Macoun kindly sent us all he had, and We 
have compared them with all the immature specimens of P. turbine 
atum in our collection and have been forced to the conclusion that _ 
this must also rank among the synonyms of that species. 
We have no desire to suppress or supplant any well-established 
new species, but cannot adopt a name, and refer other specimens : 
to it, when it is impossible to say that we are sure we should rec 
ognize it again. These specimens of P. platyphyllum have 20 
character. They are too young to show the mature shape of the - 
capsule, or the lid, or the size of the spores, and deserve to be 
relegated to the limbo of uncertainty, but as so few specimens © 
P. turbinatum have been collected in Canada it may incite others 
to gather specimens whenever they see them, hence the follow? 
amended description is given: 
Physcomitrium platyphyllum Kindb.; Macoun’s Cat. Part 4, 209 
(1892). ie 
Plants gregarious, stems simple or branched at base; leaves 
sublingulate, 2-3 mm. long, serrate above the middle, upper ¥ 
broad ovate-acuminate, indistinctly margined; vein percurren a 
ending below the apex; cells wide subhexagonal, the basal su? 
rectangular. Seta 5-10 mm. long, stout, pale yellow, bent; oF 
sule too immature to see the ultimate shape; lid conic, blunt ; 
ra 
