— 148 — 



b. Leaves long concave; alar cells well-defined. 



aa. Leaves somewhat broadly ovate-lanceolate; apical cells 

 few suboval. 

 lO.F.squainosa L. 



Leaves not distinctly decurrent, subacute often with short 

 point, more or less acuminate; middle cells lanceolate-linear, 

 inner basal sublanceolate, alar impressed at angles. Capsule 

 oval-oblong; teeth red: segments united; lid short-conic. Kocks 

 in running water. — Eur. Germany: Schimper. Belgium: 

 Gravet. France: Pelvet. Austria: Schmidt. Norway: Nyman. 

 * F.Delamarei Renauld et Cardot. 



Capsule smaller oblong-cylindric; »teeth much shorter*: Cardot. 

 — Amer. r. U. S. Miquelon: Delamare, com. Cardot. 



bb. Leaves narrowly ovate-lanceolate: alar cells not impres- 

 sed, the others uniform narrow. 

 ll.F.dalecarlica Schimper. 



Leaves decurrent gen. short-acuminate subacute; cells sub- 

 lanceolate. Capsule oval-oblong; teeth orange-red; segments us. 

 not wholly united; lid short subconvex obtuse. — Running 

 water or lakes in northern districts. Eur. Sweden not r.l; O. 

 Swartz; R. Hartman. Amer. Can.: Macoun; Powler. 

 12r.baltica KUnggraeff. 



^Differs from the last: Leaves subulate long-acuminate. 

 Peristomial teeth red; lid conic acute. Paroecious. — Lakes r. 

 Eur. Germany »: Limpricht. 

 13.F.seriata Lindberg. 



Leaves us. not distinctlj' decurrent, long-acuminate often 

 subulate with a short half-twisted point; cells sublinear. Cap- 

 sules unknown. — Rivers r. Eur. Sweden: Conr. Indebetou, 

 detector of this species. 



3. Latifoliae. 



A. Leaves of stem distant verj' concave inflated decurrent, 

 sometimes conduplicate; cell-walls sinuous. 

 14.F.Heldreichii C. Mueller. 



Stem us. simple; its leaves cymbiform subcircular obtuse 

 obtusate or short-acuminate; alar cells not well-defined, the 

 others sublanceolate. Capsules unknown. — Rivulets in alp. 

 region r. Eur. Greece: Heldreich. 



B. Leaves of stem distant, plicate in middle, decurrent us. 

 conduplicate; cells subf usiform not sinuous at walls. Us. dioecious. 



a. Endostome completely cancellate. Stem without special 

 branchlets. 



