— 244 — 



'2.B.canadensis Kindb. revue bryol. 1896. — D. clavellata var. 

 canadensis Kindb. cat. Canad. m. 



Differs from the last: Leaves gen. subobtuee, channelled, 

 distinctly- involute at borders all around. Perichetial leaves 

 broader, more obtuse; nearly all cells lax and long-rectangular. 

 Capsule globose a little larger; lid short-rostrate. Tufts some- 

 times brown. Monoecious. Nearly allied to D. ohtusifolia C. 

 M. from Chili. — On trees r. Amer. Can. near lake Erie: 

 Macoun. 



108. Seouleria Hooker. 



A. Leaves broad, thinly or indistinctly limbate only below. 

 Peristome gen. persistent at least partly. 



l.S.aquatica Hooker. — Grimmia Scouleri C. M. 



Leaves ovate-lanceolate, broader at base, below middle tape- 

 ring to the contracted broad point, sharply serrate to it from 

 middle, blackish (or only the uppermost green) and strongly 

 appressed when dry; marginant cells opake very distinct; other 

 cells gen. dusky thick- walled, exc. few linear not porose inner 

 basal. Inner perichetial leaves shorter and less dusky. Perigo- 

 nial leaves short suboval very obtuse. — Wet rocks r. Amer. 

 Can.: Macoun. U. S.: Henderson, com. Cardot. 

 2.S Mnelleri Kindb. cat. Canad. m. 



Leaves subelliptic, broader near middle, with very short ar- 

 rounded broad point, sharply serrate from it to below middle, 

 oUve green and sometimes less strongly appressed when dry; 

 cells subpeliucid, the marginant pale orange not well-defined, 

 the linear inner basal numerous porose. Inner perichetial 

 leaves very pellucid from short dilated entire base tapering to 

 a sublinear serrate acumen. — Wet rocks r. Amer. Can. Pacif. 

 distr. Brit. Col. near Revelstok 1890 and Vane. isl. 1893: 

 Macoun. 

 * S.catilliforrais C. Mueller. 



Leaves nearly entire; marginant cells dusky. Capsules un- 

 known. — Amer. r. U. S.: Roell, com. C. Mueller. 

 S.S-Neevii C. Mueller. 



Differs from S. Muelleri: Leaves obtusely crenulate, patent 

 when dry; upper cells dusky, the lower subpeliucid, the mar- 

 ginant opake, the linear inner basal few not porose. Capsules 

 unknown. — Wet rocks r. Amer. Pacif. distr. Can. Selkirk 

 mts 1885 and 1890: Macoun. (Determined by C. M.) 



B. Leaves narrow thickly limbate all around. Peristome 

 very short and brittle soon deciduous or adhering to lid. 



