— 150 — 



Perichetial leaves abruptly narrowed to a longish subulate acu- 

 men. — - Streams r. Amer. Can.: Macoun. U. S.; Henderson, 

 com. Cardot. 

 n.F.gothica Cardot et Arnell. 



Leaves of stem ovate obtuse sometimes canaliculate or less 

 conduplicate; apical cells few suboval, alar faintly brown well- 

 defined impressed at angles. Branch-leaves narrow. Capsules 

 unknown. — Stagnant water r. Eur. Sweden: 0. Nordstedt. 



b. Endostome cancellate only near apex. Stem with special 

 short branchlets; their leaves small sublinear subobtuse convo- 

 lute in upper half. 

 IS.F.biformis Sullivant icon, muscor. 



Vernal stem-leaves distant obtuse entire ovate or oblong, 

 concave or conduplicate, soon deciduous; alar cells not well- 

 defined, the others narrow subUnear. Estival stem-leaves crow- 

 ded narrowly ovate-lanceolate subacute longdecurrent, slightly 

 denticulate at apex and gen. short-acuminate; apical cells sub- 

 oval, the others lanceolate or oblong-lanceolate exc. the alar. 

 Capsule oblong-cyHndric; lid long-conic. — Streams r. Amer. 

 Can.: Macoun. U. S.: Sullivant, com. C. Mueller and J. Cardot. 



C. Leaves of stem nearly crowded and not often distinctly 

 decurrent, sometimes eubconcave not conduplicate. 



a. Leaves of stem very obtuse obtusate not distinctly decur- 

 rent. Stem without special branchlets. 



19.F.gigantea Sulliv. icon, m.; Kindb. rev. bryol. 1895. 



Stem-leaves round-ovate very large and broad, not often 

 conduplicate; apical cells suboval, middle suboblong. Branch- 

 leaves ovate- oblong short-acuminate or obtusate. Capsule broad- 

 oval; lid obtuse. Confounded with large states of F. antipyre- 

 tica. — Running water r. Amer. Can.: Macoun Canad. musci n. 228. 

 * F.roollis C. Mueller in Bot. Centralblatt. 



Stem -leaves broad-ovate very crowded not decurrent, plicate 

 in middle but not conduplicate; upper cells suboval, middle 

 lanceolate. Capsules unknown. — Rivers r. Amer. U. S. Pacif. 

 distr.: Roell, com. C. Mueller. 



b. Leaves of stem and larger branches long-acuminate subu- 

 late, often decurrent. Stem with small branchlets (as in F. hi- 

 formis); their leaves oval-oblong very small. 

 20.F.Kindbergii Renauld et Cardot; Limpricht. — F. chryso- 

 phylla Cardot ? 



Leaves often copper-brown and glossy; cells narrow. Stem- 

 leaves ovate-lanceolate sometimes conduplicate; branch-leaves 



