— 259 — 
53.B.platyneura C. M. et Kindbi l- e.' T 
Differs - from B. revoluta: Leaves shorter, ovate-oblong acute; 
costa distinctly excurrent.. Capsules unknown. — Rocks r. 
| Amer. Can. Brit. Col.: Macoun. i 
54.B.revolvens Schimper. — Desmatodon Husnot m, G. 
Leaves oval-oblong obtusate us. obtuse, revolute nearly to 
apex; prominent lamina somewhat broad; costa scarcely excur- 
rent not broader above.  Perichetial leaves sheathing not revo- 
lute. “Capsule oblong; teeth once contorted. Tufts loose. — 
Stonewalls r. Eur. France; Philibert. 
"B. Leaves simply not spirally revolute. Peristome half- 
twisted. WoL ee 
55.B.atrovirens Smith. — Grimmia Sm.; Barbula Schimper; 
Desmatodon nervosus Br. eur. 
Leaves oblong-linear or suboval obtusate, revolute nearly to 
apex; prominent lamina broad; costa broader above us. short- 
excurrent, ^ Perichetial leavés similar; the innermost one shor- 
ter, neither revolute not sheathing. Capsule suboval. Tufts 
loose, — On stone in warmer distr. r. — Eur. France: Le Jolis. 
Amer. »U. S.»: Lesq. et Jam. 7 
56 B.subtorquescens C. M. et Kindb. l. c. 
Differs from the last: Leaves less opake and more obtuse 
not revolute near apex; prominent lamina broader; costa gen. 
. percurrent not broader above. Capsule cylindric. Tufts some- 
. what higher, very compact. — Rocks r. Amer. Can Gaspe 
. Coast and Assa: Macoun. i 
9. Streblotrichum Palisot de Beauvois. . 
A. Pedicel yellow. Spores small. Dioecious. 
a. Peristome much contorted; annulus revoluble, Leaves 
. papillose entire narrow, crisped; basal cells short-rectangular hya- 
. line; costa not excurrent. Tufts us. low. 
. 57.B.convoluta Hedwig. — B. Closteri Austin ? if 
Leaves sublinear or oblong-lanceolate obtusate gen. not reflexed: 
perichetial nearly nerveless with short point. Capsule oblong; 
lid shorter. — On earth. Eur. common below alp. regions. 
Sweden, Norway, Switzerl. Amer. Can.: Macoun. à 
* B.commutata Juratzka. — Trichostomum undatum Schimper. 
: Stem higher. Leaves narrow-lanceolate much longer: peri- 
. chetial broadly acuminate. Capsule larger. — Wet calcareous 
rocks: also-in alps r. Eur. SwitzerLl Engl: Burgess. Belgium: 
er. 
