— 32 — 



l.T.leucocladulum C. M. — Hypnum C. M. 1. c. 



Leaves pellucid, recurved below middle; cells small short, 

 alar dusky numerous. Stem-leaves entire below acumen, gen. ovate- 

 oblong long-acuminate; cells gen. narrow. Branch-leaves sub- 

 ovate smaller; cells gen. oval-oblong. Perichetial leaves sharply 

 serrate. Capsule small cylindiic-oval suberect; endostome without 

 basal membrane; lid conic acute; pedicel short. Perigonial 

 leaves entire broad-oval obtuse. Stem pinnate; branches slender 

 julaceous. — Amer. Western distr. r. U. S.: Harwey, com. C. 

 Mueller; Leiberg, com. Roell. 

 2.T.compressulum C. Mueller 1. c. 



Differs from the last: Leaves subovate gen. short-acuminate, 

 those of stem faintly denticulate nearly all around. Stem irre- 

 gularly divided. » Capsule cernuous narrowly cylindric»: C. M. 

 — Amer. Pacif. distr. r. U. S.: Neeve, com. C. Mueller. 



B. Leaves gen. entire, only those of branches faintly denti- 

 culate near apex. Capsules unknown. 



S.T.rupestre Kindb. cat. Can. m. — Platvgvrium Kindb. bull. 

 Torr. club XYII. 



Leaves gen. subovate. Stem irregularly divided. Tufts in- 

 tricate. — Differs from the both last: Stem-leaves more broadly 

 revolute to above middle; branch-leaves often obtusate acute; 

 alar cells more numerous. — Rocks r. Amer. Can. Brit. Col.: 

 Macoun. 



Fam. 11. ClimaciacesB. 



34. tllimaelum Weber et Mohr. 

 l.C.dendroides L. — Hypnum L.; Climacium W. ^I. 



Stem-leaves broadly ovate-oblong apiculate entire not decurrent. 

 Branch-leaves ovate-lanceolate obtuse with subcordate base, den- 

 ticulate above middle, sharply dentate at apex; upper cells 

 linear-lanceolate, lowest inner basal shorter and wider, alar and 

 lower basal us. red-brown. Perichetial leaves costate. Capsule 

 cyhndric not long; teeth purplish brown ; lid with not long 

 beak. Less often fruiting. — Wet meadows and rocks r. on 

 trees or in water. Eur. common! Amer. r. Can.: Macoun. U. S.: 

 Henry, com. Cardot. 



In a variety, floating in water, stem is irregularly divided. 

 Eur. Sweden: E. Nyman. 



In an other variety (forma depauperata Boulay"?), growing on 

 trees, the naked part of stem is nearly indistinct, leaves are 

 densely appressed when dry, their alar cells hyaline. Eur. 

 Norway near Lillehammer! 



