1897] Macoun — Cryptogamic Flora of Ottawa. 167 



119. A. obtusifolius, Br. and Sch. 



Abundant on the bases of trees in black ash swamps and wet 

 woods around Ottawa. Fruiting in the autumn. On trunks south end 

 of Cowley's Farm, near Hintonburg, April i8th, 1896. 



120. A. apiculatus, Bruch and Schimp. 



On decaying logs and flat limestone rocks in McKay's Woods, op- 

 posite the entrance to Beechwood Cemetery ; on limestone rocks, 

 Rockclifife Park, April 22nd, 1896. 



121. A. viticulosus, Hook, and Tayl. 



Very common on limestone rocks near McKay's Lake and along 

 the Ottawa west of FIull, and on damp ledges in woods along the 

 Beaver Meadow west of Hull, Que. ; on damp rocks facing the river, 

 Rockcliffe Park, April 22nd, 1896. 



122. A. heteroideus, Kindb. 



Plants densely tufted, green, finally fuscescent or blackish. Stem 

 creeping, subpinnate, much branching and furnished with numerous 

 small, flagelliform branchlets, densely beset with very small, oblong, 

 obtuse and nerveless leaves ; paraphyllia broad. Stem-leaves sub- 

 distant, decurrent, appressed when dry, open-erect when moist, from a 

 broadly ovate base suddenly narrowed to a long, subulate or sublinear 

 acumen, entire, faintly papillose ; margins revolute at tire base ; branch- 

 leaves more attenuate ; cells round-oval, the marginal of the base quad- 

 rate ; costa vanishing below the acumen. Dioecious. Fruiting specimens 

 not found. This species resembles Leskea nervosa in habit. 



On flat limestone rocks and the roots of trees in McKay's Woods, 

 opposite the entrance to Beechwood Cemetery ; on limestone rocks at 

 Meeche's Lake, near Chelsea, Que., Sept. 23rd, 1893. 



XLV. PLATYGYRIUM, Bru:h and Schimp. 



123. P. repens, Bruch and Schimp. 



On old logs in woods at Eastman's Springs, Casselman and Car- 

 leton Place ; on old logs in woods north of Beechwood, May 7th, 1896. 



Var. orthoclados, Kindb. 



Branches elongate and not curved. All basal leave-cells orange. 

 Segments linear, not completely free at base, smooth or dentifculate at 

 one side, not shorter than the teeth. 



On old logs at the south end of Skead's Farm, west of Hinton- 

 burg, May i5ih, 1885. 



