1897 | NORTH AMERICAN SPECIES OF AMBLYSTEGIUM 257 
Columbia, New Jersey, Ohio, West Virginia, Wisconsin, Min- 
nesota and Texas. Not rare. 
This moss has in several instances been confused with Hypnum reptile. 
The likeness between the two forms however is only in general appearance and 
size. Once the leaves of the two are subjected to a microscopical examination 
no difficulty need be experienced in separating them, the leaves of 1. refiile 
being long and gradually acuminate and strongly serrate in the upper half, 
generally distinctly falcate and secund. Between A. adnatum and A. subtile 
there are occasional forms which are puzzling in the absence of the sporo- 
phyte, but usually the size of the leaf and dimensions of the leaf cells are 
Sufficient to separate them. 
AMBLYSTEGIUM SERPENS (Hedw.) Br. and Sch. Plate XT. fig. 6. 
SyNon.: Hypnum serpens Hedwig, Musc. Frond. 4: 45. #2. 78.1797. Spec. 
Musc. 268. 1801.— Swartz, Musc. Frond. Suec. 65. 1799.— Bridel, Musc. 
Recent. 2?: 111. 1801. Spec. Musc. 2: 243. 1812. Mant. Musc. 183. 1819. 
Bry. Univ. 2: 642. 1827.— Smith, Fl. Brit. 1306. 1804.— Turner, Muscologia 
Hibernicze Spicilegium 169. 1804.— Palisot de Beauvois, Prodr. 70. 1805.— 
Schultz, Prodromus Flore Stugardiensis 322. 1806.— Weber and Mohr, 
Bot. Tasch. 300. 1807.— Wahlenberg, Fl. Lapp. 376. 1812. Fl. Carpat. 359. 
1814.— Roehling, Deutschl. Fl. 3: 110. 1813.—Schwegrichen, Spec. Musc. 
Suppl. 1. 2: 260. 1816.— Martius, Cr. Erl. 15. 1817.— Hooker and Taylor, 
Muscologia Brittanica 94. 1818. — Hooker, Flora Scotica 2: 142. 1821.— 
Funck, Moost. 50. fv. 45. 1821.— Gray, Nat. Arr. Brit. Pl. 1: 754. 1821.— 
Huebener, Musc. Germ. 679. 1833.— De Notaris, Syl. Musc. Ital. 10. 1838.— 
Rabenhorst, Deutsch. Krypt. Fl. 23: 292. 1848.—C. Mueller, Syn. Musc. 
Frond. 2: 411. 1851. Deutschl. Moos. 454. 1853.— Wilson, Bry. Brit. 362. 
1855. Sullivant, Musc. and Hepat. U. S. 78. 1856.— Berkeley, Handb. Br. 
Moss. 96. 1863.— Hobkirk, Syn. of Brit. Mosses. 163. 1873.— Boulay, Muse. 
Fr. 79. 1884.— Lesquereux and James, Man. Moss. N. Amer. 373. 1884. 
Hypnum spinulosum Hedwig, Spec. Musc. 269. f/. 69. f. 5-70. 1801. 
Lypnum contextum Hedwig, Spec. Musc. 273. A/. 72. f. §-12. 1801. 
Amblystegium serpens Bruch and Schimper, Bry. Eur. Ambly. 9. pl. 3. 
1853.— Schimper, Syn. (1st ed.) 591. 1860. (2d ed.) 709. 1876. — Milde, Bry. 
Siles. 323. 1869.— De Notaris, Epi. Bry. Ital. 153. 1869.— Hartmann, Skand. 
Fl. (roth ed.jeo, 18717,— Hobkirk, Syn. 212. 1884.— Lindberg, Musc. Scand. 
1879.— Macoun and Kindberg, Cat. Can. Pl. 6: 218. 1892.— Husnot, Musc. 
Gall. 357.42. roz, 1893.— Dixon and Jameson, Stud. Handb. 442. A/. 56. 1896. 
— Braithwaite, Brit. Moss. Fl. 3: 23. Dl. 89. 1896. 
c Amblystegium serpens subsp. schlotthaurri Renauld and Cardot, Bot. 
en 
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