— 275 — 



basal cells j'ellowish or subhj-aline; costa often eicurrent to A 

 curved point. Capsule oval-oblong; teeth papillose often deeply 

 cleft; pedicel red. Tufts dense- very low or 2 — 6 c. m. high. 



— Calcareous stones. Eur. Sweden, Switzerl.l Spain: Levier. 

 France: Roux; Berthoumieu. Amer. r. »U. S.»: Lesq. et Jam. 

 S.D.Tiridlllus Bruch. — Trichostomum Br.; Didymodon Kindb. 



Differs from the last: Leaves longer, linear-lanceolate, gradu- 

 ally loiig-acuminate. subulate. Capsule smaller. Stem low. — 

 Eur. r. Sweden! Switzerl.: Culmann, eom. Husnot. 

 S.D.breTifolius Sendtner. — Trichostomum Sendt.; C. M. syn.; 

 Didymodon Kindb.; MoUia Braithwaite. 



Leaves short from broader base nearly gradually attenuate 

 obtuse; basal cells yellowish pellucid; costa sometimes excurrent. 

 Capsule minute round-oval; lid as long; teeth papillose; pedicel 

 reddish below, yellow above. Tufts dense 0,5 — 1,5 c. m. high. 

 Habit of D. crispulus. — Limestone rocks r. Eur. »Engl.»: 

 Braithwaite. »Bosnia: Sendtner»: C. M. 



b. Leaves concave not involute, somewhat broad and sub- 

 oblong-linear; basal cells hyaline. 



lO.D.littoralis Mitten. — Trichostomum Mitt.; Didymodon 

 Kindb. 



Leaves obtuse; costa smooth yellowish short-excurrent. Cap- 

 sule oblong; teeth deeply cleft. Tufts green 1 — 4 cm. high. 



— Rocks near Atlantic sea r. Eur. Engl.: Curnow. France: 

 Le Jolis. Norway: Hagen. 



n .D.trachyneuron Kindb. n. sp. 



Leaves short-attenuate subacute brittle; costa pale, papillose 

 at back, sometimes excurrent. Tufts low, green. Capsules 

 unknown. — Rocks r. Amer. Can. near Quebec: Macoun. 

 III. Erythrophyllum Lindberg. 



A. Leaves nearly smooth and faintly reflexed, not twisted 

 when dry. Tufts loose eradiculose. Capsules unknown. 

 12.D.oenodes C. M. et Kindb. — D. oeneus C. M. et Kindb. 

 cat. Canad. m. (not D. seneus Schimper). 



Leaves vinous-red ovate-oblong or narrowed from subovate 

 base, acute entire not apiculate, loosely appressed when dry; 

 costa nearly smooth at back. — Rocks r. Amer; Can. Brit. Col.: 

 Macoun. 



B. Leaves distinctl.y papillose and reflexed, crisped. Tufts 

 dense. 



a. Leaves from broad-ovate base long-subulate; costa some- 

 times excurrent. Plants robust, 



