— 815 .— 
; I. Eu-Zygodon. 
E À. Leaves sublinear apiculate us. not falcate; cells not opake. 
. Tufts small low. 
a. Costa of leaves not excurrent. Capsule suboval. 
1.Z.viridissimus Dickson. — Bryum Dicks.; Zygodon R. Brown. 
Leaves gen. complicate above, r. dentate near apex, patent 
. or curved when moist, green when dry. Capsule with short 
neck; teeth none. Often with propagula. — Trees. Hur. not 
r. France: Le Jolis. Amer. r. Can. Vane. isl: Macoun; Drum- 
mond 27. 
* Z.rupestris Lindb. | 
Leaves narrower with longer pellucid terminal cell (point), 
often faleate, us. brown when dry.— Rocks somewhat r. Eur, 
Sweden! 
 2.2.conoideus Dickson. — Bryum Dicks.; Zygodon Hooker et 
Taylor; Z. Brebissoni Br. eur. 
Leaves entire not complicate above, suberect when moist; 
cells larger than in the last. Capsule with longer and narro- 
wer neck; peristome double. — Trees r. Eur. Engl: Holt. 
France; Brébisson; Le Jolis; Camus. Amer. »U. 8.»: Cardot. 
b. Leaves with excurrent costa. Capsule round-oval; teeth 
|J none. 
. 3.Z.Stirtoni Schimper; Braithwaite. [ 
Leaves entire gen. not complicate above, suberect when moist. 
Often with propagula. — Rocks and stonewalls r. Eur. Engl.: 
Holt. Sweden: Berggren. , 
— B. Leaves ovate-lanceolate dentate above, falcate when moist; 
upper cells small opake; costa not excurrent, Tufts large; 
. stem long. 
4AZ.gracilis Wilson; Braithwaite. TENE 
Leaves broadly long-acuminate. Capsule cylindric with short 
neck; peristome double. Tufts dark green. Habit of Barbula 
reflexa. — Calcareous rocks r. Eur. Engl.: Rogers; Holt. 
5.Z.Sullivantii C. Mueller; Sullivant ic. m. 
Leaves subulate-acuminate. Capsules unknown. Tufts brown- 
yellow, — Rocks r Amer. »U. S.»: Sullivant. 
E II. Gymnocephalus Schweegrichen. i 
— 6.Z.Forsteri Dickson. — Bryum Dicks.; Zygodon Wilson. 
Leaves flaccid entire sublingulate acute or short-acuminate; 
. Upper cells roundish, the hyaline basal rectangular; costa us. 
= subpercurrent. Capsule piriform or oblong-eylindrie with 
long neck; peristome double. Tufts small. — On bark of 
