Perichetial leaves costate hyaline, pale yellow at base. Capsule 
suboval; teeth orange; segments split; cilia appendiculate; lid 
short-beaked; pedicel rough. — Rocks also in alp. region. Amer. 
Pacif. distr. Alaska:.J. M. Macoun. Can.: J. Macoun. 
B. Leaves, at least those of branches, without distinct hair- 
point. Stem creeping subpinnate or bipinnate. 
2.T.leuconeuron Sulliv. et Lesquer.; Sull. icon. muscor. 
Leaves approached when moist, smaller than in the last; 
cells round-oval. Stem-leaves ovate-lanceolate subulate or broad- 
ovate obtuse with filiform point. Perichetial leaves nerveless. 
Capsule small suboval; teeth pale; segments split; cilia nodose; 
annulus large; lid with short thick often curved beak; pedicel 
smooth. Tufts green. — Trees and rocks r. Amer. Pacif. distr. 
r. Can: Macoun. U. S.: Marshall A. Howe; Bolender, com. 
C. Mueller. 
3.T.Whipplei Sullivant. — Hypnum Sull.; Thuidium Kindb. 
Differs from the last: Leaves larger longer narrower and more 
distant; cells suboblong. »Pedicel of capsule rough; annulus 
none; perichetial leaves costate»: Lesq. et Jam. — Rocks r. 
Amer. Pacif. distr. Can.: Macoun. 
IL Pseudo-Claopodium Kindb. 
LEM Schweegrichen. — Hypnum Schw.; Thuidium 
indb. 
»Leaves denticulate. Stem-leaves from ovate base short-acu- 
minate; branch-leaves ovate. Capsule globose-ovate; cilia short; 
lid obliquely rostellate; pedicel rough. — Earth r. Amer. 
Northwest coast: Menzies»: C. M. syn. ' 
5.T.pseudo-pygmsum  Kindb. (new name). — Hypnum pyg- 
meum Schimper, non Taylor; Sulliv. icon. muscor.; H. remo- 
tifolium Greville? 
Leaves entire opake short-acuminate very small; those of 
stem ovate-oblong, those of branches somewhat longer; costa 
often excurrent. Capsule very small suboval; cilia short; lid 
tostrate; pedicel smooth. Stem pinnate or bipinnate. — Wet 
rocks r. Amer. U. S.: Austin, com. Macoun. 
II. Micro-Thuidium Kindb. (in check-list). 
A. Leaves crisped when dry; cells rotundate. Paraphyllia 
humerous. Monoecious. : 
6.T.minutulum Hedwig. — Hypnum H.; Thuidium Br. eur. 
Leaves entire subovate opake; costa not exourrent. Stem- 
leaves us. short-acuminate; branch-leaves obtuse shorter; costa 
faint. Capsule small suboblong horizontal; cilia long; lid 
