= 157 — 
1.C.contorta Menzies. — Catharinea Mz.; Pogonatum Sull. ic. 
m. in part. 
Leaves dark green sublinear acute strongly dentate nearly 
all around; cells of sheath chlorophyllose subquadrate; lamellæ 
about 30, their cells rotundate green; costa dentate at back, 
not excurrent. Capsule narrow subcylindric strangulate not 
large; peristomial membrane elevate; pedicel contorted. — On 
roots of trees (Douglas-firs) r. Amer. Pacif. distr. Alaska: J. M. 
Macoun. Can. Brit. Col: J. Macoun. U. S.: Hall, com. Macoun. 
'2.C.atrovirens Mitten. —- Pogonatum Mitt. 
Differs from the last: Leaves shorter, more distinctly shea- 
thing, bright or glaucous green, more strongly crisped; cells of 
sheath hyaline; lamelle about 20. — Roadsides r. Amer. 
Can. Brit. Col: Macoun. 
B. Leaves longacuminate not sheathing: marginal teeth 
large with 2—3 red cells; lamelle about 40. Stem and pedi- 
cel very long. 
3.C.erythrodontia Kindb. l. e. — Pogonatum contortum Sull. 
l c. in part. 
Habit of C. contorta. — Wet woods r. Amer. Alaska: J. M. 
Macoun. Can. Brit. Col. and Vane. isl: J. Macoun. 
. €. Leaves short-acuminate short-sheathing; marginal teeth 
not large, formed by one single cell, finally pale yellow not 
red; lamelle about 20. Capsules unknown. Stem not long. 
 4QC.Dixoni Braithwaite. — Catharinea Braithw. brit. mossfl.; 
Catharinella Kindb. rev. bryol. 1894. 
Leaves dark green. not long, linear-lanceolate acute, dentate 
above gen. to middle, broadly bordered by wings of lamina 
. Often nearly all around; cells of sheath subquadrate not chlo- 
. Tophyllose; costa short-excurrent dentate at back. — On base 
of trees r. Eur. Engl: Dixon, com. Braithwaite. 
73. Polytrichum L. 
A. Calyptra short-acuminate densely hairy. 
. 4. Capsule papillose. Leaves often incurved when dry, r. 
aristate, : 
L Aloidella. Capsule without angles and apophysis. ; 
Capsule smooth. Leaves rigid not incurved, gen. aristate. 
. IL Pogonatum. Capsule without angles and apophysis, 
. geen when unripe, finally blackish or r. brown. Stem us. 
hai Apical cell of lamella thick-walled subglobose pa- 
: ose, 
ES Eu-Polytriehum. Capsule (ripe) with 4—6 angles and 
