(145 ) 
Hypnum scorpioides L. (Scorpidium scorpiotdes (L.) 
Limpr.) Just above Lake Lindeman in blackish mats almost 
covering the bottom of a.small pond 12 or 15 inches below 
the surface. The plants have the appearance of great age, 
most of the leaves being worn into shreds (783). 
flypnum scorpiotdes gracilescens Sanio. In dried-up 
swamp a few miles below White-horse Rapids, covering ex- 
tensive areas with a mat up to 18 cm. thick. The stems are 
slender, with short, distant branches and leaves distantly 
placed (793). 
fylocomium proliferum (L.) Lindb. (H. splendens Hedw.) 
Lake Lindeman, Thirty-mile River and Dawson. An 
abundant species occasionally fruiting. Plants variable in 
size and color, the long stems sometimes scarcely branching 
(784). 
flylocomium Pyrenaicum (Spruce) Lindb. (H. Oakesii 
Sulliv.) Lake Lindeman, on rock (785). 
flylocomium squarrosum (L.) B. & S. Lake Lindeman 
(786). 
flylocomium triquetrum (L.) B. & S. Yukon River below 
Ft. Selkirk and Klondike River bottom near mouth. Not 
apparently very common (787). 
flylocomium loreum L. Caiion City, Dyea Creek and 
Skagway. Not observed on the Yukon River (788). 
flylocomium rugosum(Ehrh.) De Not. (Hypnum rugosum 
L.) Lake Marsh and. Mile’s Cajfion, sterile specimens abun- 
dant. Dawson, not rare in fruit (794). 
Description of Plates. 
Camera lucida drawings reproduced without reduction. 
PLATE 15. Ditrichum giganteum. 
Figs. I and 2. Plants, natural size. 
Fig. 3. Capsule enlarged. 
Fig. 4. Perichaetium, 9. 
Fig. 5. Inner perichaetial leaf enlarged. 
Fig. 7. Part of peristome and capsule, 285. 
3 
4 
5 
Fig. 6. Apex of stem leaf, 285. 
7 
Fig. 8. Marginal cells % down leaf, « 285. 
