158 
On rocks around Kicking Horse Lake, Rocky Mts., sterile, 
(Macoun. an 
Macoun's specimens are more slender and have smaller, more 
filiform- d leaves than is usual with the European plant. The 
description of the sporophyte is taken largely from ur S 
description in Rabenhorst's Kryptogamen Flora. 
HOLMGRENIA RUFESCENS (Dicks.) Lindb. 
Notes from Dr. Mitten indicate that diee ee rufescens 
(Dicks.) Lindb. has not yet been found in North America. In a 
letter dated April 21, 1896, he says: “ I have teed through all 
my specimens of Orthothecium rufescens and find no trace of any 
North American examples. All Taylor sent me are in with O. 
chryseum, as are the 221 of Drummond in both my sets. I sup- 
pose I must have mistaken one of Taylor's to be the first named." 
4. CLIMACIUM Web. & Mohr, Iter Suec. 96. 1804. Also 
Bot. Taschenb. 252. 1807. 
Gametophyte erect, dendroid, with underground creeping stems; 
rarely decumbent or floating. Primary stems densely radiculose ; 
secondary simple below, fasciculately branching above. Stem and 
branches covered with branching filaments which are chlorophyll- 
bearing above. Leaves pluriseriate, decurrent ; those of secondary 
stem squamiform, large, closely imbricated and clasping. Branch 
leaves smaller, crowded, imbricate. Dioicous ; antheridial branches 
rare, scattering. Sporophyte with seta long, smooth, twisted to the 
right; calyptra dimidiate, long, embracing base of capsule. Cap- 
sule erect, cylindric. Operculum conic-rostrate, beak often oblique. 
Columella persistent. Annulus none. Peristome double; teeth 
linear-lanceolate, closely articulate, minutely papillose. Segments 
of endostome as long as teeth, carinate, cleft between the articu- 
lations, split to the apex when old, attached to a narrow basal 
membrane, minutely papillose. Spores minutely papillose. 
Capsules 3-4: I ; median leaf-cells 10: 1. I. C. dendroides. 
Capsules 5-6: 1 ; median leaf-cells 2-7: 1. 2. C. Americanum. 
I. CLIMACIUM DENDROIDES (L.) Web. & Mohr, Iter. Suec. 96. 
1804. Also Bot. Taschenb. 252. p/. ro. f. 2. 1807. 
Hypnum dendroides L. Sp. Pl. 118. 1753. 
Leskea dendroides Hedw. Sp. Musc. 228. 180r. 
