254 BOTANICAL GAZETTE [OCTOBER 
capsule thin and flaccid, cells of exothecium parenchymatous, 
varying from quadrate to oblong, 22 » wide by 46 p long, varying 
in width from 13 to 26mand in length from 21 to 804, walls uni- 
formly thickened, 4», three to five rows of cells below the mouth 
hexagonal, 13 to 21.5 in diameter, stomata eight to fifteen, 
scattered, 274 wide by 35m long; peristome teeth pale yellow 
with hyaline border, lance-linear, strize on the back transverse 
in lower two thirds, oblique above or replaced by irregularly 
scattered papilla, endostome equaling the teeth, one-third to 
one-half the length of the segments, the latter linear, carinate, 
open along the keel between the articulations, sparsely papillose, 
cilia very rudimentary or none, operculum high convex to conic, 
obliquely apiculate; annulus of one or two rows of cells: spores 
pale, 10 to 16min diameter: calyptra equaling the capsule, split 
more than half its length. 
Has.: On bases of tree trunks, chiefly maple, beech and 
willow; rarely on shaded rocks. Type locality Switzerland. 
Europe, Asia, North America: New England, New York, 
New Jersey, Ontario, and westward along the Great Lakes to 
Wisconsin and Minnesota. Not rare. 
" This with the preceding three species, on account of their uniformly small 
size, form a group, all of which are usually easily distinguished from all other 
members of the genus, though small forms of A. adnatum and A. serpens 
may sometimes be mistaken forthem. The former has leaves proportionately 
broader, more abruptly and shorter pointed, with cells very regular an 
uniformly larger in upper parts of leaf. The latter usually shows a distinct 
costa in the lower third of the leaf, 
AMBLYSTEGIUM ADNATUM (Hedw.) Aust. Plate XM. fig. 5: 
Synon.: Hyfnum adnatum Hedwig, Spec. Musc. 248. fl. 64. BE cadet 
1801.— Palisot de Beauvois, Prodr. 61. 1805.— Bridel, Spec. Musc. 2+ 100. 
1812, Mant. Musc. 168. 1819.— Schweegrichen, Spec. Musc. Suppl. I. 2° 
215. 1816.—C. Mueller. Syn. Musc. Frond. 2; 339. 1851.— Sullivant, Muse. 
and Hepat. of U. S. 78. 1856. Icon. Musc. 197. A/. 727. 1864.— Lesquereux 
& James, Man. Moss. N. Am. 375. 1884. 
Hypnum (Stereodon) adnatus Bridel, Bry. Univ. 2: 591. 1827. 
Amblystegium adnatum Macoun & Kindberg. Cat. Can. Pl. 6+ 220 
g2. 
