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John Macoun and determined by the late N. C. Kindberg as Grimmia 
Agassizii Lesq. & James. On comparing these plants with the de- 
scription in the Manual I noticed a number of discrepancies which 
I recorded in my published note referred to above. 
Mrs. E. G. Britton, inferring correctly that I had not the type of 
Grimmia Agassizii kindly sent me a part of the type, a close examina- 
tion of which disclosed the fact that G. Agassizii vera is a quite dif- 
ferent thing from Can. Musci 80a and the Alaskan plant. 
Further investigation of descriptions and plants of arctic Grim- 
mias led me to conclude that this is an undescribed species of the 
section Schistidium, differing decidedly from the nearly related G. Agas- 
sizii and G. maritima in important respects, chief among which is the 
bistratose leaf lamina. After searching the list of published names 
of Grimmia species, to make sure that I am not duplicating a name, 
I have decided to name this plant — 
Grimmia (§. Schistidium) Kindbergii. In light green 
cushions on earth (?). Plants about an inch high, sparingly 
branched. Leaves slightly curled at top when dry, straightening 
when moistened ; brittle and easily torn in dissection ; the lower nar- 
rowly triangular, the upper and comal rapidly becoming more than 
twice the length of the lower, gradually widening from the narrow 
base to about the middle, then narrowing more abruptly to a slender 
subulate apex, which is entered but not reached by the thick 
terete costa. Leaf margin entire, but made to appear slightly toothed 
by the projection of low broad papillae, which cover both sides of leaf 
above the middle. Areolation in the lower part, for nearly half the 
distance, pellucid and elongate rectangular, becoming shorter and 
isodiametric as they meet the opaque cells of the upper part. Leaf 
section bistratose becoming unistratose, sporadically, below the mid- 
dle. 
Capsule: dry or wet, perfectly smooth (not wrinkled), transparent 
pale-yellow, short-oval, surmounted by a stout-beaked operculum, the 
beak as long as the operculum is wide; vaginule apparently lacking 
paraphyses, longer than the short seta ; and it, with seta and beaked 
capsule, is barely half as long as the perichaetial leaves. 
Teeth of peristome as described for Gr. Agassizii m the Manual, i.e., 
“dark red, thick and entire below, pale and cribrose above.” 
Spores (not quite ripe), smooth, pale yellow, 22-26 
As I stated in the July Bryologist, p 85, this species is at once 
known by its pale green color, the soft, tender leaves quite devoid of 
hair points, straight when moist, and by the clearly bistratose lamina. 
Type station : Catala, Alaska. 
Collector: Mr. G. C. Britton U. S. Commissioner in 1904. 
Type in the herbarium of Prof. J. B. Plett, and of the author. 
Winona, Minn. 
