= n 
2.T.Leibergii Britton. 
Differs from the last: Leaves broader, those of. branche 
broadly oval-oblong less acuminate; cells larger, middle oval 
lower oblong-linear; costa shorter. Capsule suboval; pedicel 
somewhat short. — Damp rocks r. Amer. Can.: Macoun. U.S. 
Roell; Leiberg, com. Mrs Britton. 
3.T.alleghaniense C. Mueller. — Hypnum C. M.; Sulliv. icon 
m.; Thamnium Schimper. 
Branches turgid. Middle stem-leaves ovate obtuse often fim 
briate above; branchleaves suboval obtusate subacute very con: 
cave; cells not much larger than in T. alopecurum, middle oval 
inner basal oblong-linear; costa thick nearly smooth not mucl 
long. Capsule suboblong; pedicel curved not long. Sometimes 
Synoecious or monoecious. — Damp rocks and shaded banks 
Amer. not r. Can. r.: Macoun. U. S- Austin, com. Macoun. 
b. Stem-leaves broadly ovate-lanceolate. Capsules unknown 
4.T.Toccoxw Sullivant et Lesquereux. — Anomodon S. et Lq. 
Sull. icon. musc.; Thamnium Kindb i 
Branches turgid often curved. Leaves sharply serrate 
fimbriate above; cells very small nearly. all uniform seria 
costa smooth subpercurrent. Stem-leaves acute with short 
acumen or point, faintly recurved below; inner cells subova 
few apical sometimes sublinear. Branch-leaves smaller nar 
wer longer-acuminate more distinctly recurved.  Periche 
leaves narrow filiform-pointed costate. — Rocks r. Amer. U. 
Georgia: Lesquereux, com. Renauld; Small, com. Roell. i 
€. Leaves narrow, those of stem .lanceolate-linear, thos 
branches sublanceolate. Capsules unknown. 
5.T.angustifolium Holt. 
Middle stem-leaves acuminate serrate; middle and lower e 
suboval; costa thick very broad below. Branches. more slend 
than in T. alopecurum. — Wet rocks r. Eur. Engl. G. A. Ho 
B. Leaves small narrow sharply serrate all around; cos 
dentate at back in its whole length, percurrent or subexcurren 
Capsules unknown. | ; 
6.T.miero-alopecurum Kindb. rey. bryol. 1895. c 
Leaves suboblong decurrent: cells nearly uniform ro 
rhombic or subquadrate; costa narrow. Stem low; branc 
turgid, — Amer. r, U. $, Oregon: J, A. Hertzman, com. 
Nyman 1886. 
