c4 A 
around; apical cells suboblong; costa vanishing near middle. 
Stem pinnate not radiculose; branches curved nearly crowded 
and subjulaceous. Tufts brown-green. »Capsule suberect oval- 
cylindric; lid acuminate; pedicel slightly rough»: Lesq. et Jam. 
— Amer. Pacif, distr. r. Can.: Macoun. U. S. Oregon mt Hood: 
Roell. 
4.I.brachycladon Kindb. revue bryol. 1895. 
Differs from the last: Leaves smaller; those of stem subovate 
nearly entire with very short or indistinct costa; branch-leaves 
sometimes short-acuminate. Stem creeping irregularly divided; 
branches distant very short, slightly curved and not julaceous. 
Tufts bright green. Capsules unknown. Habit of I. striatulum. 
— Under damp rocks r. Amer. Can. Vane. isl: Macoun 1893. 
b. Stem-leaves denticulate below middle; costa thick reaching 
to "h. Leaves not large. 
5.LBreweri Lesquereux. — Hypnum Lq.; Isothecium Kindb. 
Stem-leaves ovate acute or short-acuminate, denticulate below, 
serrate above; branch-leaves suboblong acute more sharply ser- 
rate; upper and middle cells rhombic or oblong-rhomboidal, 
lower lanceolate, alar short on a long space. Perichetial leaves 
abruptly contracted to a very long subulate serrate acumen. 
Capsule small subcylindrie erect or inclined; teeth yellow higher 
than segments; cilia long; lid acute. Tufts dense subintricate 
us. brown and glossy. Stem subpinnate; branches crowded 
julaceous. Habit of Pterogonium. — Rocks r. Amer, Pacif. 
distr. Can.: Macoun. U. S.: Brewer, Henderson and Miss Mann, 
com, Cardot. 
6.I.myurellum Kindb. bull. Torr. club XVII. 
Differs from the last: Leaves more sharply serrate above; 
cells narrower, middle linear, alar disposed on a short space. 
Perichetial leaves nearly entire with short filiform point. Cap- 
sule suboval; lid mamillate or subapiculate. Tufts loose not 
glossy, often dark green. Stem pinnate; branches distant. — 
Trees r. Amer. Pacif. distr. Can.: Macoun. U. S.: Boleender, 
com. Cardot. : 
TLhyloeomioides Kindb. — I. myosuroides subsp., Kindb. 
note on Canad. bryol. 1898. 
Differs from I. Breweri: Leaves shorter, subovate gen. sub- 
obtuse, more sharply serrate above to below middle; apical 
cells oval-oblong, middle and lower linear, alar disposed on a 
short space,  Perichetial leaves minutely dentieulate. . Capsule 
cylindric oblong sometimes curved; teeth pale yellow; cilia short; 
