— 2?7 — 



known. — Stony places r. Eur. r. » France, 2000 metr. a. s.»: 

 Husnot 1. c. 



IV. Desmatodon (Bridel) Schimper, in part. 



A. Leaves with not excurrent costa, papillose. 

 'iO.D.arenacens Sullivant et Lesquel-eux. — Desmatodon S. L.; 

 SuUiv. icon, m.; Didymodon Kindb. 



Leaves suboblong or oblong-lanceolate gen. obtuse, reflexed 

 nearly all around. Capsule long C3'lindric; teeth short whitish 

 cleft to middle; lid short thick. Stem 1— 2 c. m. high. Mon- 

 oecious or pseudo- monoecious. — Sandstone rocks r. Amer, 

 U. S.: Sullivant, com. C. Mueller; Demetrio, com. Cardot. Eur, 

 »Norway»: Hagen. 



B. Leaves with long- excurrent costa. 

 22.D.plinthobius Sullivant et Lesquere.ux. — Desmatodon S. L.; 

 Didymodon Kindb. 



DifEers otherwise from the last: Lid of capsule narrower 

 somewhat longer. Dioecious. — Limestone rocks r. Amen 

 U. S.: Ravenel, com. C. Mueller; Langlois, com. Cardot. 

 22.]).neoinexicauus Sull. et Lesq. — Desmatodon S. L.; Didy- 

 modon Kindb. 



»Differs from the last in nearly entire peristomial teeth. 

 Monoecious. — Amer. r. U. S. Texas: Wrights: Lesq. et Jam. 

 23 D.systylius Schimper. — Desmatodon Sch.; Didvmodon 

 Kindb. 



Leaves oblong-lingulate acute gen. short-acuminate, subpellu- 

 cid and nearly smooth, flat or near base indistinctly reflexed. 

 Capsule cylindric; teeth irregularly cleft yellowish Or reddish; 

 lid systylic; pedicel yellow or finally pale red. -^ Ro^ks i\ 

 Eur. in higher alp. region. Eur. Norway. Amer. N. Foundl.: 

 Waghorne (»D. systylioides » Ren. et Card.). Can. Manitoba: 

 Macoun. 



V. Eu-Didymodon. 



A. Leaves broadly acuminate or obtuse. Tufts not high; 



&• Leaves papillose; costa not excurrent. Peristome well- 

 evolute. 



24.D.tophaceus Bridel. — Trichostomum Brid.; Didymodon 

 Juratzka; D. Hendersoni Ren. et Card.; Barbula brevifoliaLindb. 

 , Leaves ovate-oblong or ovate, obtuse or acute us. concave 

 with thick borders, more or less crisped. Capsule ovate-oblong 

 or subcylindric; pedicel red. Tufts olivaceous reddish- brown 

 below us. very compact r. loose. — Rocks princ. calcareous 

 and stonewails,, Eur. princ. in warmer districts, not i r. 



