1898] Macoun— Cryptogamic Flora of Ottawa. 53 



Creek, west of Hull, Que. ; on limestone rocks at Leamy's Lake ; on 

 limeslone rocks between Aylmer and King's Mountain, May 22nd, 

 1897. 



XVI. COLLEMA, Hoffm. 



325. Collema myriococcum, Ach. 



Growini^ on mas';, on limestone rocks by the Ottawa, below 

 Governor's Bay, Rockcliffe Park, April i6th, 1891. 



326. Collema pulposum, (Bemh.) Nyl. 



On earth on limestone rocks " Pine Hill," Rockcliffe Park, April 

 i6lh, 1896. 



327. Collema crispum, Borr. 



On calcareous earth in the cutting for the Aylmer Railway west of 

 Hull, Que., April 27th, 1895 ; on earth in crevices of rocks at King's 

 Mountain near Chelsea, Que., May 22nd, 1897. 



328. Collema limosum, Ach. 



On calcareous earth in the cutting for the Aylmer Railway west of 

 Hull, Que; very rare. April 27th, 1895. 



329. Collema floculosa, Nyl. 



On limestone rocks below Governor's Bay, Rockcliffe Park, April 

 17th, 1895 ; on naked limestone rocks in woods south of the Aylmer 

 Electric Railway, west of Hull, Que. ; very rare, May i6th, 1895. 



330. Collema tenax, (Ach.) Tuckerm. 



On calcareous earth on wet rocks in the cutting for the Aylmer 

 Electric Railway west of Hull, Que., April 27th, 1895; on calcareous 

 eanh along the limestone ledges at Rockcliffe Park, April 12th, 1896. 



XVII. LEPTOGIUM, Fr. 



331. Leptogium tenuissimum, (Dicks.) Koerb. 



On sandy earth, on old fence rails along the Richmond Road 

 west f)f Hintonburg, April i8th, 1896. 



332. Leptogium lacerum, (Ach.) 



On limestone rocks amongst moss in the cutting for the Aylmer 

 Electric Railway, west of Hull, Que., April 27th, 1895 ; on limestone 

 rocks by the Ottawa below Governor's Bay,* Rockcliffe Park ; on damp 

 rocks, King's Mountain, May 22nd, 1897. 



333. Leptogium pulchellum, (Ach.) Nyl. 



On trees in woods, Rockcliffe Park, Sep. i6th, 1889, very rare. 



