— 128 — 
Stem-leaves. subovate acuminate decurrent. Branch-leaves narro- 
wer, gen. more crowded; cells suboblong. . Perichetial leaves 
gen. not striate. Capsule) subcylindric arcuate, smaller and 
shorter-pedicellate than in-H, commutatum. Tufts: us. dense and 
dirty green. Stem often creeping; branches us. crowded; para- 
phyllia often present. Dioecious, —. Wet places, common. Eur. 
Sweden, Norway, Germany, Switzerl.| . Eur. Can. Mácoun. 
* H.curvieaule Juratzka. ; 
Leaves gen. not faleate; alar -cells yellow; stem-leaves shori 
acuminate. Stem nearly eradiculose. — Alps r. Eur. Norway: 
Bryhn; E. Nyman. Austria: Breidler. Switzerl.: Culmann. 
* H.Vallis-clausæ Bridel. — Hypnum Formianum Schimper. 
Leaves long-acuminate; cells less dilated; costa excurrent. 
Stem long, often’ denudate below and covered by persisten! 
nerves. — Running water r: Eur: »France»: Boulay. »ltaly» 
Schimp. syn. i 
Upper leaves: ovate-lanceolate long-acuminate nearly entire; 
costa excurrent. Stem as in the last, — Running water T. 
Eur. Sweden! Engl.: Rogers: Germany: Roemer. pone 
5.H.fluviatile Swartz. — Amblystegium Br. eur. sity 
Leaves: gen. entire, ovate-oblong or ovate-lanceolate, acute or 
short-acuminate, not or indistinctly decurrent, us. not falcate 
and not distant, dark green; cells lanceolate-oblong, the small 
alar gen. not much distinct; costa subpercurrent. Capsule as 
in the last. Stems not or sparingly radiculose, gen. irregularly 
divided and not tufted; branches long; paraphyllia none. Very 
r. fruiting. — Inundated rocks. Eur. not r. Sweden, Germany! 
Amer. Can: Macoun. U.S. r.: Austin. B 
*H.irriguum Hooker et Wilson. — Amblystegium Br. eur. 
Leaves sinuolate-dentieulate, from subovate base long-acumr 
nate, subdecurrent, somewhat distant and patent; alar 
distinct; costa subexcurrent. Stem us. rigid when dry. — - 
Eur. not common. Sweden, Germany, Switzerl| Amer. Can: -— 
Macoun; Waghorne. U; S.: Austin. i 
III. Harpidium Sullivant. 
. " Riparia. 
6.H.riparium L. — Amblystegium Br. eur. ; 
Leaves ovate-l:nceolate gradually acuminate sometimes filiforn ; 
pointed, entire, scarcely decurrent, us. distant and large; middle 
cells, also often the upper, narrowly linear; costa r. percurrent, 
