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times short-excurrent. Annulus reroluble gen. broad. Tufts 

 greenish, rufescent or reddish. 



I. Syntrichia C. Mueller. 

 1. Ruraliformes. 

 A. Leaves short not distinctly carinate; lower basal cells 

 uniform hyaline (in B. Icevipila the outer sometimes narrower 

 and not hyaline); hairpoint often smooth, sometimes (in B. mutica) 

 "wanting. Peristome contorted, longer than basal tube. Dioe- 

 cious or {B. alpina and sometimes B. Icevipila) monoecious. 

 Stem not high. 



a. Leaves muticous nearly flat, sometimes reflexed near 

 base. 



l.B.mutica Lindberg. — Tortula Lindb.; Barbula Kindb.; B. 

 latifolia (Bruch) Br. eur. 



Leaves subspathulate obtuse. Capsule large; teeth once or 

 twice contorted. Tufts dusky green. Often with propagula 

 (brood-corpuscles). Very r. fruiting. — On base of trees r. 

 on stones. Eur. not r. in warmer districts. Germany! Sweden; 

 Lindberg; S. Hardin. Amer. r. U. S. Oregon: Roell. 



b. Leaves with hyaline us. short and smooth hairpoint, 

 involute (at least when dry) above, flat below. 

 2B.papillosa Wilson. — Tortula Wils.; Barbula C. M. 



Leaves subspathulate or short-lingulate obtuse. Capsule very 

 smal]; teeth faintly contorted. Tufts dusky or brownish green. 

 Often with propagula. » Fruiting only in Australia »: Braith- 

 waite. — On trees princ. in warmer distr. Eur. less r. Switzerl.l; 

 Roell. Norway: E. Nyman. Sweden; Lindberg. France; Hus- 

 not. Amer. r. »U. S.»: Lesq. et Jam. 



C. Leaves us. with hairpoint, not involute, reflexed below. 



aa. Peristome not much contorted, much longer than tube. 

 S.B.alpina Br. eur. 



Leaves oblong-lingulate sometimes subacute, reflexed below 

 middle: the lower muticous; lower basal cells somewhat small 

 and not much long; costa smooth reddish; hairpoint smooth 

 red or hyaline gen. short. Tufts rusty red below. Monoecious. 

 — Rocks princ. in alps r. Eur. Switzerl.l France; Philibert. 

 Austria: Breidler. Sweden: A. Grape. 

 *B.pagorum Milde. 



^Leaves not reflexed, often with propagula. Capsules un- 

 known. — Stone-walls r. Eur. Austria: Milde »: Limpricht. 

 4.B.breTipe8 Lesquereux. — »B. alpina»: cat. Can. m. 



Differs from B. alpina: Leaves nearly flat at borders, obtuse 



