— 131 — 



Leaves entire large crowded shining; costa reaching to the 

 acumen, often brown. Stem-leaves from subovate or ovate- 

 oblong bape tapering to a shorter, subulate filiform-pointed 

 acumen. Branch-leaves gen. ovate-lanceolate longer-acuminate. 

 Capsule large arcuate; teeth pale; pedicel 3 — 5 c. m. long. 

 Tufts yellowish or brown. — Gen. r. Eur. Sweden! England: 

 Holt. France: Husnot. Amer. »Greenl. »: Berggren. »U. S.»: 

 Lq. et Jam. 



b. Leaves short-decurrent not plicate. Stem us. subpinnate. 

 14.H.aduiiCUm L.; Hedwig; Schimper. 



Leaves crowded not large, from subovate base tapering to a 

 longer sometimes denticulate acumen, r. ovate-lanceolate. Cap- 

 sule small; pedicel not long. Tufts green or j^ellowish. — Eur. 

 probably not r. Norway fruiting! Germany: Schimper (com. 

 as »the typical H. aduncum-*). Amer. r. U. S. Roell. Can.: 

 Macoun; Waghorne. 

 IS.H.Wilsoni Schimper. 



Leaves distant large, from ovate lanceolate base tapering to 

 a shorter gen. entire acumen. Capsule large slightly curved; 

 pedicel very long. Tufts dusky green. — R. Eur. Engl. South- 

 port near sea, fruiting: G. A. Holt; T. Rogers. Sweden, isl. 

 Gothland: Zetterstedt, com. E. Haglund. Am,er. U. S.: Roell. 



0. Tufts loose eradiculose. Leaves long-decurrent not striate, 

 often not falcate; alar cells large. 



a. Capsule large not (exc. H. cafillifolium) annulate; pedicel 

 very long. Leaves gen. long and narrow; cells linear exc. the 

 alar; costa us. long. Sometimes monoecious, less r. fruiting. 

 le.H.fluitans L. 



Leaves from narrowly ovate-oblong or ovate-lanceolate base 

 tapering to a gen. longer acumen, us. entire and green. — 

 Eur. common below alps, r. in alp. regions. Sweden, Norway! 

 Amer. Can.: Macoun. Greenl.: Berggren. 

 IT.H.capillifolium Warnstorf. 



Differs from the last: Costa of leaves gen. long-excurrent. 

 »Capsule annulate*: Renauld. — Eur. r. Norway! Germany: 

 Warnstorf. 

 IS.H.exannulatum Guembel, 



Leaves from ovate-lanceolate base tapering to a gen. shorter 

 acumen, us. denticulate below and reddish or brown, r. green, 

 often very distant. — Eur. common in northern districts, princ. 

 in alp. regions, r. in southern districts. Sweden, Norway! Amer. 

 Can. riot r.: Macoun; Waghorne. Greenl.: Berggren, 



