'^0 THE CANADIAN NATURALIST. [Vol, 



VU. 



ADDITIONS TO THE CANADIAN LICHEN FLORA. 

 In the number of this jonrnal for October, 1865, there was 

 ,published a provisional list of the Lichens of Ontario and Que- 

 bec. This embraced every species then known to occur witliin 

 these provinces. The nomenclature of Prof. Tuckerman's Synop- 

 sis, published in 1848, was necessarily followed as being the only 

 accessible authority on American Lichens. The views of the 

 author of the Synopsis are now, however, widely different — the 

 result of long, patient investigation — and following the arrange- 

 ment of his recent Genera Lichenum, the same provisional list 

 published now would indicate many generic and specific changes* 

 The additions now made to the list include a number which are 



interesting as being semi-Arctic in range. In determining many 



of these species, I am again indebted to the valued assistance of 

 Prof. Tuckerman. 



I trust that those who have the opportunities will pay special 



-attention to the Lichens of the Lower St. Lawrence coasts, New- 

 foundland and Nova Scotia as, particularly there, new or interest- 

 ing species may be expected. 



•Cetraria Fahhneiisis, Schaer. Tadousac and Owl's Head, 

 Lake Memphramagog. 



.Parmdla stygia, Ach. Tadousac. 

 UmhUicaria erosa, Hoffm. Tadousac. 



■U. hypei-horea, Hoffm. Tadousac. 



Peltigera malacea, Ach. Tadousac. 



Pa nn aria nigra, Nyl. 



Collema pycnocarpum. Nyl. Durham, P.Q. 



'C.fiaccidum, Ach. Tadousac. 

 'C pulp)osmn, Bernh. 



'C./urviim^ Nyl, 



.Leptogium chIoronieJu7n, Nyl. 



-Lecanora Hageni, Ach. Ottawa. London. 

 L. moli/hdina, Schaer. — an Arctic plant hitherto only knowo 

 from Greenland but now detected at Tadousac and more 

 recently by Prof. Tuckerman at Mt. Desert on the coast of 

 Maine. 

 Z/. cervina, Somnierf. wars jjruinosa and simplex. 



.Rinodina ascociscana^ Tuck. Bark of trees. 



.Pertusaria hi/menia, Tuck. Syn. 



^Biatora sanguineo-atra, Tuck. Syn. 



^. mixta ^ Fr. 



