252 BOTANICAL GAZETTE [ OCTOBER 
distinguished by ch ters referred to under that species ; from the latter it is 
distinguished by its smaller cells in the alar region and shorter and more 
irregular cells in the middle and apical regions. Further, 4. subtitle shows 
a distinct trace of costa in most leaves and has its parts in general one-half 
larger. 
AMBLYSTEGIUM SUBTILE (Hedw.) Br. & Sch. Plate XI. fig. 3. 
Synon.: Hypnum minimum Haller, Hist. Stirp. Helvet. 1768. 
Leskea subtilis Hedwig, Musc. Frond. 4: 23. £2. 9. 1797. Sp. Musc. 221. 
1801.—Swartz, Musci. Suecie 69. 1799.—Roth, Fl. Germ. 3: 335. 1800.— 
Bridel, Musc. Recent. 3: 44. 1801. Bry. Univ. 2: 309. 1827.—Weber & 
Mohr, Bot. Tasch. 250. 1807.—Reehling, Deutschl. Flora (2d ed.) 3: 87. 
1813.—Wahlenberg, Fl. Carpat. 356. 1814.—Schweegrichen, Sp. Musc. Suppl. 
I, 2: 176. 1816.— Martius, Flora crypt. Erlang. 48. 1817.—Funck, Deutsch. 
Moos. 55. f/. 76. 1820.— Hiibener, Musc. Germ 587. 1833.— DeNotaris, Syl. 
Muse. Ital. 62. 1838.— Hartmann, Skand. FI. (roth ed.) 21. 1871. 
Hypnum subtile Hoffmann, Deutschl. Flora 2: 70. 1796.—Smith, Flora 
Brit. 3: 1277. 1804.—Palisot de Beauvois, Prodrome 71. 1805.—C. Mueller, 
Syn. Musc. Frond. 2: 415. 1851. Deutsch. Moos. 454. 1853.— Sullivant, 
Musci and Hepat. of U.S. 77. 1856.—Lesq. & James, Man. Moss. N. Am. 
372. 1884. 
Neckera tenuis Bridel, Mant. Musc. 138. 1819. 
Hypnum (Stereodon) serpens var. subtilis Bridel, Bry. Univ. 2: 649. 1827. 
Amblystegium subtile Bruch & Schimper, Bry. Eur. Ambly. 4. £4. 7 1853. 
—Schimper, Synop. Musc. Eur. (1st ed.) 589. 1860. (2d ed.) 706. 1876.— 
Milde, Bry. Siles. 322. 1869.—DeNotaris, Epil. Bry. Ital. 155. 1869.— 
Hartmann, Skand. Fl. (roth ed.) 21. 1871.— Lindberg, Musc. Scand. 32. 
1879.—R. du Buysson, Ess. Anal. 1883.—Macoun & Kindberg, Cat. Can. 
Pl. 6: 217. 1892.— Husnot. Musc. Gall. 356. A/. 702. 1894. 
Exsiccatl: Hypnum subtitle Sull. & Lesq., Musc. Bor. Amer. (1st ed.) 
342. (2d ed.) 519.— Macoun, Can. Musc. 316. (Herb. Wis.). 
Amblystegium subtile Austin, Musc. App. 369. (Herb. Wis.). 
TYPE in herb. Haller, Berne, Switzerland. 
Gametophyte bisexual, small, widely cespitose, dark green, 
coherent in tangled felts: stems repent, slender, 60 to IIOP in 
diameter, I to 3 long, radiculose to the apex, branched, 
cylindrical; central strand none ; cortex of one or two layers - 
small cells 6.5 to 10.7 in diameter; cells of ground tissue 13 
to 21.7 w in diameter, largest at the center, cell walls uniformly 
thickened in all tissues with the occasional exception of cells 
in the outer cortical layer where the wall is thin; branches 
