— 394 — 



7.A.Macoiinii Kindb. bull. Torr. club 1890. 



Leaves from short ovate or broadly ovate-lanceolate base 

 abruptly narrowed to the sublinear acumen, papillose princ. on 

 upper part of costa,, whick is purple red gen. long-excurrent 

 but not filling whole acumen below. Tufts brown or brown- 

 red when dry. Capsules unknown. — On inclined faces of 

 rocks by rivulets in higher alp. region r. Amer. Can. Brit. Col. 

 2250 metr. a. sea: J. Macoun. U. S. Oregon: Roell. 



B. Leaves smooth on lamina, papillose on the long-excm-- 

 rent costa, crowded, slightly crisped. Tufts low dense. 

 S.A.Blyttii Schimper. 



Leaves from short ovate base abruptly narrowed to the ex- 

 current costa. Tufts us. blackish when dry. — Northern alps 

 r. Eur. Norway: M. N, Blytt; Zetterstedt. Amer. GreeuL: Berg- 

 gren, com. Nathorst. 



3. Rupestres. 



A. Leaves with not or slightly excurrent costa; the inner 

 perichetial with percurrent costa. 



9.A.Rothii Weber et Mohr. 



Leaves crowded us. ovate-lanceolate broadly acuminate sub- 

 acute and not falcate. Tufts low dense blackish or red-brown. 

 — Siliceous rocks. Eur. not r. Norway! Sweden!; R. Hartman. 

 France: Husnot. Amer. r. »U. S.»: Lesq. et Jam. 

 * A.falcata Schimper. 



Leaves falcate smaller, from ovate-oblong base abruptly nar- 

 rowed to the subulate acumen. Tufts us. blackish. — Alp. 

 rocks r. Eur. Spain, Switzerl.! France: Husnot. Amer. Can.: 

 Macoun. 



B. Leaves gen. with long-excurrent costa: inner perichetial 

 nerveless, 



a. Leaves short ovate or ovate-oblong crowded often sub- 

 erect when dry: perichetial us, smooth. 

 lO.A.crassineryis Bruch. 



Leaves subovate; costa thick terete long-excurrent. Inner 

 perichetial leaves long-acuminate, outer costate. Tufts dense 

 blackish. — Rocks princ. below alps near sea. Eur. Sweden 

 less r.!; M. Huss. Norway: E. Nyman. Finl.: Axel Arrhenius. 

 Amer. r. N. Found!.: Waghorne. 

 ll.A.obtusifoIia Berggren in sched. 



Leaves ovate-oblong; costa faint applanate excurrent not til- 

 ling whole acumen below. Nearly all perichetial leaves nerve- 

 less: inner obtusate or shortracuminate. Tufts loose blackish. 



