-— 150 — 
Perichetial leaves abruptly narrowed to a longish subulate acu- 
men. — Streams r. Amer. Can.: Macoun. U. $.; Henderson, 
com. Cardot. 
17.F.gothiea Cardot et Arnell. 
Leaves of stem ovate obtuse sometimes canaliculate or l 
conduplicate; apical cells few suboval, alar faintly brown well- 
defined impressed at angles. Branch-leaves narrow. Capsules. 
unknown. — Stagnant water r. Eur. Sweden: O: Nordstedt. 
b. Endostome cancellate only near apex. Stem with special 
short branchlets; their leaves small sublinear subobtuse convo- 
lute in upper half. ría. 
18.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 sublinear. Estival stem-leaves crow- 
ded narrowly ovate-lanceolate subacute long-decurrent, slightly 
denticulate at apex and gen. short-acuminate; apical cells sub- 
oval, the others lanceolate or oblong-lanceolate exc. the alar. 
Capsule oblong-cylindrie; lid long-conie, — 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 subconcave not conduplicate. T 
à. Leaves of stem very obtuse obtusate not distinctly decur- 
rent. Stem without special branchlets. wwe 
19.F.gigantea Sulliv. icon. m.; Kindb. rev. bryol. 1895. dy 
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 
fica. — Running water r, Amer, Can.: Macoun Canad. musei n. 228. 
* F.mollis C. Mueller in Bot, Centralblatt. : Te 
Stem-leaves broad-ovate very crowded not decurrent, plicate 
in middle but not i i 
lanceolate. Capsules unk 
distr: Roell, com. C, Mu 
b. Leaves of 
Leaves often copper-brown and glossy; cells narrow. Stem 
leaves | ovate-lanceolate sometimes conduplicate; branch-leaves - 
