1897 | NORTH AMERICAN SPECIES OF AMBLYSTEGIUM 265 
broad; annulus of one or two rows of cells: spores papillose, 15 
to 21.5 in diameter: calyptra small, one-third to one-half the 
length of the capsule, split one-half to three-fifths its length. 
Has.: On decayed wood, at the bases of trees in swamps or 
along streams. Type locality North America (Drummond), 
North America: New Brunswick, Ontario, Lake Huron, 
Pennsylvania, New York, Wisconsin, Canadian Rocky mountains, 
Montana, Nevada, Utah, Colorado, California, and Washington. 
Widely distributed and not uncommon. 
A well marked species, the habit of growth in more or less dense tufts 
being sufficient ordinarily to separate it from all of its relatives; further the 
strong and peculiar serration of its leaves mark it at once. After carefully 
examining all the material known to exist in America of A. subcompactum 
Kindb. and A. dissitifolium Kindb., I have been unable to separate them from 
A. compactum, though they differ from the typical form in some small degree. 
AMBLYSTEGIUM VARIUM (Hedw.) Lindb. Plate XT. fig. 10. 
SyNoN.: Leskea varia Hedwig, Spec. Musc. 216. £4. 53. f 75-20. 1801.— 
Bridel, Spec. Muse. 2: 71. 1812. Mant. Musc. 146. 1819.—Schweegrichen, 
Spec. Musc. Suppl. I. 2: 174. 1816. 
um varium Palisot de Beauvois, Prodr. 72. 1805. 
Hypnum orthocladon Bridel, Spec. Muse. 2: 241. 1812. Mant. Musc. 182. 
1819. Bry. univ. 2 : 537. 1827.—Schwegrichen, Spec. Musc. Suppl. 1. 2: 
262. 1816.— Sulliyant, Musc. and Hepat. of the U. S. 78. 1856. Icon. 
Musc. 199. A/. 722. 1864.—Lesquereux & James, Man. Moss. of N. Amer. 
374. 1884.— Not of Palisot de Beauvois. 
Hypnum debile Bridel, Spec. Musc. 2 : 250. 1812. 
Hypnum (Stereodon) varius Bridel, Bry. univ. 2 : 652. 1827. 
Hypnum serpens B. varium C. Mueller, Syn. Musc. Frond. 2 : 412. 1851. 
Amblystegium radicale Bruch & Schimper, Bry. Eur. Ambly. 10. A/. ¢. 
1853.— Schimper, Syn. Musc. Eur. (1st ed.) 592. 1860. (2d ed.) 711. 1876. 
—Milde, Bry. Siles. 324. 1869.— De Notaris, Epil. Bry. Ital. 154. 1869.— 
Hobkirk, Syn. (2d ed.) 213. 1884. 
Jpnum radicale Wilson, Bry. Brit. 363. £2. 25. 1855.— Sullivant, Muse. 
and Hepat. of the U.S. 78. 1856.— Berkeley, Handb. Brit. Moss. 97. 1863.— 
Hobkirk, Syn. 164. 1873.— Boulay, Muse. Fr. 73. 1884.— Lesquereux & James, 
Man. Moss. of N. Amer. 373. 1884.— Not of Palisot de Beauvois. 
Stereodon varius Mitten, Jour. Linn. Soc. 8 : 43. 1864. 
Amblystegium varium Lindberg, Musc. Scand. 32. 1872.— R. du Buysson 
Etud. gen. Ambly. 1883.— Macoun & Kindberg, Cat. Can. Pl. 6 : 219. 1892. 
