— S5- 
situations generally. Under D. Kneiffit are here included a number of forms for- 
merly referred to Hypnum aduncum Hedw., but more recently treated by various 
authors as distinct species. Some of these forms may indeed be specifically dis- 
tinct, but their status in this respect seems altogether too uncertain to warrant 
attempting to separate them at the present time. 
Drepanocladus revolvens (Sw.) Warnst.* Frequent in marshes and 
swamps, and along springy banks. Pine Point Bog; Cecil Bay; Big Stone Bay; 
Mackinac Island. 
Drepanocladus scorpioides (L.) Warnst. Locally abundant in wet marsh- 
es. Pine Point; Cecil Bay. 
Drepanocladus Sendtneri (Schimp.) Warnst.* Floating in pools in open 
swamps; locally abundant near Burt Lake. 
Drepanocladus Sendtneri Wilsoni Warnst.* Smith's Bog. 
Drepanocladus trifarius (Web. f. & Mohr.) Broth.* Wet sandy marshes; 
local at Pine Point and Cecil Bay. 
Drepanocladus vernicosus (Lindb.) Warnst. Local in wet, open bog; 
Mud Lake. 
Heterophyllon Haldanianum (Grev.) Kindb. On rotten logs anfl earth; 
common in moist woods. 
HoMOMALLiUM ADNATUM (Hedw.) Broth.* On tree bases and gravelly banks; 
occasional in open woods. Fontinalis Run (Ehlers); Colonial Point. 
Hygroamblystegium filicinum (L.) Loeske.* Springy places and along 
streams; locally very abundant. Gorge; Mackinac Island. 
Hygrohypnum palustre (Huds.) Loeske, On wave-washed logs and wet 
rocks; rare at Burt Lake Bluff and on Mackinac Island. 
Hylocomium splendens (Hedw.) Br. & Sch. Common on the ground in 
moist woods. 
Hypnum Schreberi Willd. On ground, logs, and stumps; one of the com- 
monest mosses of moist woods. 
Isopterygium elegans (Hook.) Lindb.* Moist woodo, usually on earth 
or rocks; rare. Mud Lake Hardwoods and Carp Lake Hardwoods (Ehlers); 
Big Stone Bay. 
Isopterygium turfaceum Lindb. Common in moist woods, usually on 
decaying logs. 
Plagiothecium denticulatum (L.) Br. & Sch. Gravelly lake bluffs, and 
on the ground in wet woods; frequent. 
Plagiothecium Roeseanum Br. & Sch.* Occasional on moist shaded banks. 
Polypody Bluff; Fairy Island; Burt Lake Hardwoods. 
Plagiothecium striatellum (Brid.) Lindb. On the ground or logs; fre- 
quent in moist woods. Reese's Bog; Burt Lake Hardwoods. 
Ptilium crista-castrensis (L.) De Not. On the ground, logs, and stumps; 
frequent in moist woods. Reese's Bog; Cecil Bay. 
Rhytidiadelphus triquetrus (L.) Warnst. On' the ground in moist woods; 
common. 
