— 208 — 



orange nearly partite; lid short subobtuse or apiculate; annulus 

 scarcely loosed; pedicel pale red. Stem very short. — Earth 

 in higher alp, region r. Amer. Can. Rocky mts 1950 metr. a. 

 B.: Macoun. 



1b. Leaves gradually acuminate from not sheathing base. 

 Pedicel yellow. 

 lO.D.heteromalla L. — Bryum L.; Dicranella Sch. 



Leaves flexuous or straight when dry, sometimes denticulate; 

 lower cells long, upper shorter; costa broad us. denticulate 

 near apex. Capsule nitid orange more or less oblique and in- 

 clined, r. suberect, finally sulcate; teeth cleft to middle; lid 

 long-rostrate. Tufts us. green often soft and silky- Hke. — 

 Damp earth and rocks common. Eur. Sweden, Norway, Germany, 

 Switzerl.! Amer. Can.: J. Macoun; Waghorne. Alaska: J. M. 

 Macoun. U. S.: com. Macoun (a variety with longer not di- 

 stinctly sulcate capsule). 



* D. Fitzgerald! Renauld et Cardot. 



Capsule suberect and subsymmetric. — - Amer. U. S.: Fitzge- 

 rald, com. Cardot. 



B. Leaves carinate gradually acuminate not sheathing; costa 

 gen. not excurrent. Capsule not or indistinctlj^ striate. Tufts 

 low us. not shining. 



a. Leaves entire, recurved below; alar cells us. dilated. 

 ll.D.rubra Dickson. — Bryum Dicks.; Dicranella Brotherus; 

 D. varia Schimper; D. Howei and D. Langloisii Renauld et 

 Cardot. 



Leaves ovate-lanceolate or ovate-oblong us. nearly straight: 

 upper scarcely longer; cells gen. narrow exc. the alar. Capsule 

 inclined red-brown us. oblique; teeth us. not deeply cleft; lid 

 rostellate not longer than half capsule; annulus none. Tufts 

 yellowish green. — Damp clay soil and rocks. Eur. common. 

 Sweden, Switzerl.! Italy: Arcangeli. Amer. not r. Can.: Macoun. 

 U. S.: Sullivant; Howe; Langlois, com. Cardot (a var. with short 

 leaves). 



* D.callistoma Dickson. — Bryum Dicks.; Dicranella Sch. 



Capsule smaller, subsymmetric often erect, gen. not longer 

 than lid. — Rocks princ. in subalp. distr. r. Eur. Engl.: Rogers. 

 France: Le Jolis. Greece: Heldreich. 



12.D.debili.s Hooker et Wilson. — Dicranum H. W.; Sulliv. 

 ic. m.; Dicranella Lq. et Jam.; D. leptotrichoides Ren. et Card. 



Differs from D. rubra *callistoma: Capsule annulate; teeth 

 nearly partite. Upper leaves much longer than the lower. — 



