1898] Macoun — Cryptogamic Flora of Ottawa. 99 



410. Arthonia Swartziana, Ach. 



Not uncommon on oak and ironwood trees near Aylnier, Que., 

 May 6th, 1891 ; on maple trees at King's Mountain, near Chelsea, Que., 

 May 22nd, 1897. 



411. Arthonia lecideella, Nyl. 



On various young trees and shrubs. On Acer spicatum at Aylmer, 

 Que., May 6th, 1891 ; quite common on young Acer rubrum in 

 Stewart's Bush and Rideau Park ; on young maple trees at Bucking- 

 ham, Que., May 14th, 1896 ; on young red maples near Hintonburgh, 

 April i8th, 1896. 



412. Arthonia spectabilis, Flot. 



On thick bark of old trees ; common, on basswood and sugar 

 maple bark at Carleton place, May 7th, 1882 ; on bark of Carya amara 

 in woods west of Hull, Que., September 21st, 1889 ; on old maples at 

 Casselman ; on Juglans cinerea at Aylmer, Que., May 6th, 189 1 ; on 

 maple trees in Rideau Park, near Bilhngs' Bridge, April 19th, 1897. 



413. Arthonia taediosa, Nyl. 



On young beech and maples, at Buckingham, Que., May 14th, 

 1896. 



414. Arthonia dispersa, (Schrad.) Nyl. 



On bark of young sugar maples at Ottawa. Collected in Beech- 

 wood Cemetery, April i6th, 1892. 



XXXIV. MYCOPORUM, (Flot.) Nyl. 



415. Mycoporum pycnocarpum, Nyl. 



On oak bark in woods by the lake near Aylmer, May 6lh, 1891 ; 

 also on bark of young Acer rubum, at Britannia, April 20th, 1895, 



XXXV. CONIOCYBE, Ach. 



416. Coniocybe furfuracea, (L.) Ach. 



On the roots of trees in woods. On earth on pine roots in woods 

 north of Ironsides, Que., Sept. i6th, 1891 ; on roots of trees in Dow's 

 Swamp, Oct. 12th, 1887. 



XXXVI. CALICIUM, Pers. 



417. Calicium subtile, Fr, 



On dead cedar stump in Dow's Swamp, Sept. 26th, 1891. 



XXXVII. ENDOCARPON, Hedw. 



418. Endocarpum, fluviatite, DC. 



On stones in the Beaver Meadow Brook below the C. P. Ry. 

 bridge near Hull Station, Que., April 24th, 1897 ; on rocks in a brook 



