ee BE di 
2.C.americanum Bridel; Sullivant icon. muscor. 
Stem-leaves obtuse entire long-decurrent gen. broad-ovate; 
costa subpereurrent. Branch-leaves acute ovate-oblong cordate, 
dentieulate from base, sharply serrate above middle; inner basal 
cells somewhat dilated. Perichetial leaves nerveléss.. Capsule 
long-cylindric; lid long-rostrate; teeth orange-red. Often fruiting. 
— Logs and roots of. trees. Amer. common princ. in Pacif. 
distr. Alaska: J. M. Macoun. Can.: J. Macoun. U. S: Sullivant, 
com. C. Mueller; A. G. Wetherby; com. Renauld and Cardot. 
In a variety (C. americanum var. Kindbergii Renauld et Car- 
dot) leaves are shorter and broader; those of stem rotundate- 
ovate, those of branches ovate. — Amer. U. S.: com. Renauld 
and Cardot. 
35. Alsia Sullivant. 
1.A.longipes Sullivant et Lesquereux; Sulliv. icon. m. 
Stem-leaves obtusate ovate-oblong denticulate above; branch- 
leaves ovate-lanceolate acute, obtusate or short-acuminate, serrate 
above, entire and recurved below; upper cells round-oval, lower 
suboblong; costa. dentate above at back, reaching to acumen. 
Capsule cylindric erect; segments rimose; cilia appendiculate; 
lid. rostrate. Branches pinnate slightly curved, not much tur- 
gid. Dioecious. — Rocks r. Amer. U. S: Bolender, com. Re: 
nauld. 
2.A.circinnata Bridel. — Hypnum Brid.; Alsia Kindb.; Eu- 
thynchium Bryol. eur. 1 
Lower stem-leaves from broad-ovate base. long-acuminate, 
minutely denticulate; upper cells. lanceolate-linear, lower oblong: 
. lanceolate; costa vanishing in acumen.  Branch-leaves small 
ovate-oblong acute, serrate above, denticulate and recurved below; 
Inner cells gen. suboblong, middle suboval; costa subpercurrent 
dentate at back. Capsule subovate inclined or horizontal, not 
or slightly curved; segments split; cilia and lid as in the last. 
Branches turgid circinnate subpinnate.  Dioecious r. fruiting. 
Habit of Isothecium Breweri and Pterogonium. — Earth and 
Stone r, Eur. Italy: Bottini; Roell; Arcangeli.. France: Henry, 
com. Husnot, Engl: Curnow. Irel.: Holt. , 
 Seorpiurium rivale Schimper, differing in ovate obtusate 
entire leaves with suboval cells, is by Prof. Boulay regarded 
a8 a state of this species. — In water r. Eur. France: Boulay, 
com. Husnot., | | 
| 36. Isothecium Bridel. 
A. Branches not compressed. : 
