1897 ] NORTH AMERICAN SPECIES OF AMBLYSTEGIUM 249 
oblong (1: 2.5) to slightly transversely elongated (1.25 : 1), 
averaging isodiametric (26), cell walls 4 to 6m thick, three to 
five rows of cells immediately below peristome with thin walls 
and transversely elongated, 28.8 wide by 11p long; stomata five 
to twelve, scattered, 27.54 wide by 31.54 long; peristome one- 
fourth to one-third length of sporangium,teeth pale yellow, soon 
becoming hyaline, transversely striate on the back in the lower 
two-thirds, minutely papillose above; membrane of endostome 
equaling segments, the latter slender, not open along the keel, 
equaling the teeth, sparsely papillose; cilia one or two, short, 
one-third the length of segments, or none; operculum large, 
hemispherical, mamillate, annulus of one or rarely two rows of 
cells: spores pale, slightly papillose, 9 to 13m in diameter : 
calyptra small, split one half its length. 
Has.: On shaded rocks, earth, twigs, and decaying logs. 
Type locality, Pyrenees. 
Europe, North America: Ontario, mountain region of Can- 
ada, Massachusetts, Montana, Idaho, Colorado, New Mexico. 
Not uncommon locally. 
This little moss was first collected by Drummond in Canada and Blytt in 
Norway, but in both cases it was called A. confervoides, As we now know 
these plants there is little difficulty in distinguishing them by their micro- 
scopic leaf characters alone. 4 . spruce? is serrulate throughout and 4. confer- 
votdes entire; the former has elongated cells in the alar regions and linear 
ones at the apex, while the latter has much shorter cells throughout, being 
isodiametric in the alar regions and about 1 : 2 at the apex. The leaf char- 
acters distinguishing 4. sprucei from A. minutissimum have already been 
Pointed out. 
AMBLYSTEGIUM CONFERVOIDES (Brid.) Br. & Sch. Plate X/. jig. I. 
SYNON.: Aypnum confervoides, Bridel, Spec. Musc. 2: 153. 1812. Mant. 
Musc. 167. 1819. Schweegrichen, Spec. Musc. Suppl. 1. 2:218. 1816.— 
Funcke, Moost. 58, £2. 39. 1820.—Huebener, Muscol. Germ. 667. 1833.— 
De Notaris, Syllabus Musc. 11. 1838.— Rabenhorst, Deutschland’s Krypt. 
Flora 23: 292. 1848.—C. Mueller, Syn. Musc. Frond. 2: 414. 1851. Deutsch- 
land’s Moose 453, 1853.— Hobkirk, Synop. 163. 1873-— Boulay, Musc. Fr. 
80. 1884.— Lesq. & James, Man. Moss, N. Am. 372. 1884. 
Hypnum conferva Schwaegr. Spec. Musc. Suppl. 2, 1:158, A/. 142. 1823. 
Hypnum jungermanioides Bridel, Bry. Univ. 2:549. 1827- 
