— 279 — 



reflexed below, straight when moist; nearly all cells quadrate; 

 costa Bhort-excurrent or percurrent. Capsules unknown. Habit 

 of the last. — Amer. r. U. S.: Roell, com. Brotherus. 



bt Leaves mamillose nearly appressed when dry. Tufts 

 UB. red-brown, often high and very large. 

 31.D.rilfus Lorentz. — Barbula Juratzka. 



Leaves from ovate or ovate-lanceolate base gradually acuminate 

 acute, faintly reflexed to above middle; nearly all cells short; 

 costa percurrent. Capsules unknown. — Alp. rocks r. Eur. 

 Austria: Breidler. Switzerl.: Pfeffer. Norway: Zetterstedt; Ha- 

 gen; E. Nyman. Amer. sGreenl.: Berggren. 

 VI. Leptodontium Hampe. 



A. Leaves broadly limbate all around by pale cells, denti- 

 culate nearly all around, papillose. 



32.D.recurvifoliu8 Taylor. — Bryum Tayl.; Didymodon Wilson. 

 Leaves ovate-oblong obtusate subobtuse not reflexed, sprea- 

 ding when moist; costa short-excurrent. Capsules unknown. 

 Tufts blackish brown 2- — 10 c. m. high. — Wet rocks r. Eur. 

 Engl.: Holt. 



B. Leaves not or indistinctly limbate, entire below middle. 



a. Leaves papillose and reflexed; costa not percurrent. 

 33.D.flexifolius Dickson. — Bryum Dicks.; Didymodon Hoo- 

 ker et Taylor. 



Leaves oval-oblong or Ungulate, obtusate acute or apiculate, 

 dentate above middle or in upper third, reflexed at both sides, 

 spreading when moist. Capsule cylindric; teeth fugacious some- 

 times entire; pedicel pale yellow. Stem 1 — 3 c. m. high. — 

 Bare gravelly and turfy places in warmer districts r. Eur. 

 Engl.: Boswell. France: Husnot. 

 34.D.8tyriacus Juratzka. 



Differs from the last: Leaves narrower, sparingly dentate near 

 apex, reflexed at one side, patent when moist; lower basal cells 

 gen. wider. Capsules unknown. — Alp. rocks r. Eur. Austria: 

 Breidler. 



b. Leaves papillose not reflexed; costa sometimes excurrent. 

 35.D.gemmascen8 Mitten. — Leptodontium Braithwaite; »Strep- 

 topogon Mittens: Braithw. 



Leaves broadly ovate-lanceolate acuminate acute, distantly 

 dentate above, spreading or claviculiform when moist; costa 

 short-excurrent with propagula at apex. Stem 2 — 5 c. m. 

 high.. Capsules unknown. — »0n thatched roofs» r. -Evir. 

 Engl.: Davies, com. W. H. Pearson. ^ 



