— 240 — 



Stem with short branchlets. Tufts us. green. — Dry rocks 

 princ. in northern alps. Eur. Sweden common, Norway, Swit- 

 zerl.l Amer. Can.: Drummond; Macoun; Waghome. 



104. Campylostelium Bryol. eur. 

 l.C.saxicola Weber et Mohr. — Dicranum W. M.; Campylo- 

 stelium Br. eur. 



Leaves from suboblong base tapering to the longer but not 

 much narrower sublinear obtusate acumen, crisped when dry; 

 lower basal cells large rectangular, the others small quadrate; 

 costa narrow not excurrent. Capsule oblong-cylindric; teeth 

 red-yellow long narrow; lid long-rostrate; calyptra lobate; pedi- 

 cel yellow sometimes curved. Stem very short. Monoecious 

 with yellow male flowers at base of stem. — Rocks princ. of 

 sandstone, often together with Brachydontium, r. Eur. Engl. 

 W. fl. Pearson. Amer. Can.: Macoun. 



* Cstrictiim Solms Laubach. 



Pedicel finally red. »Sometimes synoecious»: Geheeb. Other- 

 wise not diflfering. — Eur. r. Portugal: Newton, com. Le Jolis. 

 105. Coscinodon Sprengel. 



A. Leaves more or less distinctlj' plicate above. Dioecious. 

 l.C.cribrosus Hedwig. — Grimmia H.; Coscinodon Spruce. 



Leaves broadly ovate-lanceolate or from subovate concave 

 base slightly tapering to the involute scarcely longer gen. obtuse 

 acumen, not recurved; alar cells not defined, the other basal 

 short-rectangular pellucid, the upper subquadrate somewhat 

 dusky; costa not excurrent. Perichetial leaves very much lar- 

 ger, more plicate, shorter-acuminate; hairpoint long, at base very 

 broad. Capsule half-emergent obovate finally inclined, orange 

 not striate; teeth orange cribrose (perforated as a sieve as in 

 the other species), deflexed or patent when dry. Tufts com- 

 pact loosely cohering about 1 c. m. high. Habit of Grimmia 

 crinita. — Schistose and siliceous rocks. Eur. not r. Norway, 

 Switzerl.l Amer. r. Can.: Macoun. 



* C.humilis Milde. 



Leaves somewhat narrower r. or slightly plicate; hairpoint 

 more rough. — Peristomial teeth sometimes less perforated. 

 Eur. r. France, Switzerl.l 



B. Leaves not plicate. Monoecious. 

 2.C.Wrightii Sullivant icon, muscor. 



Leaves very concave from subovate base abruptly narrowed 

 subobtusate, often crenulate above, sometimes reflexed below, 

 appressed when dry, erect when moist; cells short-rectangular; 



