— 190 — 



acuminate; excurrent part of costa more or less serrulate. Peri- 

 chetial leaves eubconvolute abruptly apiculate. Capsule some- 

 what, large; pedicel us. long. Tufts sparingly radiculose us. 

 green or brown-green. Not r. fruiting. — Rocks and stumps. 

 Eur. common. Sweden etc.l Amer. not common. Can.: Macoun; 

 Drummond. 

 *D.Saiiteri Schimper. 



Leaves gen. entire; costa occupying about Vo of leaf-base, 

 nearly entire; inner basal cells more numerous. Perichetial 

 leaves long-subulate. Tufts dense not sparingly radiculose. — 

 Rocks r. Eur. Norway, Switzerl.! Austria: C E. Kindberg. 

 * D.pachytrichum Kindb. cat. Can. m. (as var.). 



Leaves entire brittle; costa occupying about Vi of leaf-base, 

 faintly serrulate above; inner basal cells numerous. Perichetial 

 leaves exserted convolute short-acuminate. Pedicel of capsule 

 about 1 centim. long. Tufts brown when dry; stem wholly 

 tomentose. — Alp. rocks r. Amer. Brit. Col. Selkirk mts 1300 

 metr. a. sea: Macoun. 



B. Lamina of leaves much shorter than the excurrent part 

 of costa; alar cells reaching to it. Leaves rigid; costa very 

 broad at base. Tufts us. tomentose. 

 IS.D.pachyneuron Molendo. — Campylopus M.; Dicranum Kindb. 



Leaves falcate not brittle; awn subulate serrulate. Capsules 

 unknown. Tufts compact very tomentose. — Alp. rocks r. 

 Eur. Switzerl.! 

 16.D.serratum Kindb. (in litt. ad Limpricht 1887). 



Leaves brittle more or less curved; awn strongly serrate, its 

 upper parf sublinear. Capsule as in D. longifolium. Tufts 

 more or less radiculose us, green. — Rocks r. Eur. Norway 

 Dovrefjeld etc.l Sweden Dalsland near Rostockl; Uddewalla: P. 

 Larsson. Germany: Roell. 



VI. Dicranodontium Bruch et Schimper. 

 17.D.longirostre Weber et Mohr. — Didymodon W. M.; Di- 

 cranum Kindb.; Didymodon denudatus Lindb.; Dicranodontium 

 virginicum Britton. 



Stem not brittle. Leaves brittle at base and easily deciduous, 

 gradually tapering to a long-subulate in upper part faintly ser- 

 rulate acumen, flexuous or falcate; lower cells (above the alar) 

 gradually narrower from costa to border. Tufts us. yellowish 

 or green. Not r. fruiting. — Rocks, earth and decayed trunks. 

 Eur. not r. Spain, Switzerl., Swedenl Norway: R. Hartman. 

 Austria: Breidler. Amer. r. Can.; Moser, 



