— 157 — 



l.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; lamellae 

 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; lamellse about 20. — Koadsides r. Amer. 

 Can. Brit. Col.: Macoun. 



B. Leaves long- acuminate not sheathing; marginal teeth 

 large with 2 — 3 red cells; lamellae about 40. Stem and pedi- 

 cel very long. 



S.C.erylhrodontia Kindb. 1. c. — Pogonatum contortum Sull. 

 1. c. in part. 



Habit of G. conforta. — Wet woods r. Amer. Alaska: J. M. 

 Macoun. Can. Brit. Col. and Vane, isl.: J. Macoun. 



C. Leaves short-acuminate short-sheathing; marginal teeth 

 not large, formed by one single cell, finally pale yellow not 

 red; lamellae about 20. Capsules unknown. Stem not long. 

 4.C.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- 

 rophyllose; 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. 



a. Capsule papillose. Leaves often incurved when dry, r. 

 aristate. 



I. Aloidella. Capsule without angles and apophysis. 



b. Capsule smooth. Leaves rigid not incurved, gen. aristate. 



II. Pogonatum. Capsule without angles and apophysis, 

 green when unripe, finally blackish or r. brown. Stem us. 

 branched. Apical cell of lamellae thick-walled subglobose pa- 

 pillose. 



III. Eu- Polytrichum. Capsule (ripe) with 4—6 angles and 



