— 80 — 



III. Pseud-Acrocladium. LeaveB not falcate; alar cells very 

 large. Branches cuspidate by convolute leaves. 



IV. Scorpidiuni. Branches not cuspidate, their leaves falcate; 

 alar cells indistinct. 



b. Stem not pinnate, sometimes radiculose. 



V. Pseudo-Liinnobion. Alar leaf-cells gen. distinct. 



aa. Costa of branch-leaves subpercurrent. Stem eradiculose. 



1. Badiiformia. Leaves entire not decurrent, those of branches 

 often falcate. Dioecious very r. fruiting. 



bb. Costa of leaves gen. short or indistinct. 



2. Ochraceiformia. Leaves entire or nearly so, decurrent and 

 distant; those of branches often falcate. Stem eradiculose. 

 Dioecious r, fruiting. 



3. Molliformia. Leaves not or indistinctly decurrent, sometimes 

 denticulate, gen. crowded and not falcate. Stem not creeping 

 us. eradiculose. Often monoecious. 



4. Moiitaniforniia. Leaves Fmall eometimes decurrent, ue. den- 

 ticulate; those of branches often falcate. Stem creeping. Us. 

 monoecious. 



I. Eu-Calliergon. 



A. Leaves gen. decurrent. 

 l.C.COrdifolium Hedwig. — Hypnum H. 



Leaves us. distant and large; upper cells linear-lanceolate, 

 the lower (below middle) suboblong hyaline. Stem-leaves gen. 

 subovate; costa subpercurrent. Capsule large; lid obtuse mamil- 

 late or apiculate. Stems loo.sely tufted, r. radiculose; branches 

 gen. long and simple. Tufts us. green. Us. monoecious. — 

 Swamps and other wet plates not r. but not common. Eur. 

 Sweden! Amer. Alaska: J. M. Macoun. Can : Macoun; Moser; 

 Waghorne. 



* C. Ricliardsoni Mitten. — Stereodon Mitt.; Hypnum Lesq. 

 et Jam.; H. Breidleri Juratzka; H. cyclophyllotum Holzinger. 



Leaves less distant; only the lowest basal cells dilated; the 

 alar sometimes more distinct. Tufts more dense, often brownish 

 with golden glossy branch- tops. Stem pinnate; branches not 

 long. — Eur. Sweden, Norway! Austria: Breidler. Amer. Can.: 

 Macoun. 

 2.C.giganteiim Schimper. — Hypnum Sch. 



Differs from G. cordifolium: Leaves nearly crowded; cells sub- 

 linear except the large hj'aline alar. Tufts dense green or 

 brownish. Branches pinnate with numerous branchlets. Dioe- 

 cious very r. fruiting. — Swamps, common. Eur. Sweden, 

 Norwav! Amer. Can.: Macoun; Moser. 



