238 THE CANADIAN NATURALIST. [May 



Swartz and Mettenius, combined them in Aspidium. Leaving 

 out Aspl. ebenoides, there are described fifty-six good species and 

 six well-marked (" black-letter ") varieties. Of these the following 

 were not recognized in the second edition : — Oh. lanuginosa, Alio, 

 acrostichoides, Aspd. Filix-mas, Woodsia Oregana, Botryclium 

 Lunaria, B. simplex and B. lanceolatum. Twenty species are 

 marked with the contraction "Eu." as being common to Europe 

 and America, and from three it has been accidentally omitted (B. 

 simplex, B. lanceolatum and B. virginianum) ; to these I would 

 add for the reasons above stated Alio, acrostichoides, Woodsia 

 glabella, and also probably Aspd. fragrans (which appears to extend 

 all round the Arctic circle), which would increase this number to 

 twenty-six. But the remaining thirty species are not all of them 

 confined to America; Adiantum pedatum, Pellcea gracilis, Aspl. 

 theli/pteroides and Onoclea sensibilis are also Asiatic and Aspl. 

 eheneum has been collected in Africa. Of the sixty-two species 

 and varieties forty-nine are known to me as Canadian, in addition 

 to which the following may be looked for within our boundaries 

 with good prospect of success, — Ch. vestita, Woodwardia areolata, 

 Aspl. Ruta-muraria, Aspd. Filix-mas (about Lake Superior), 

 Woodsia obtusa, W. Oregana (about Lake Superior), and 

 Li/godium palmatum ; on the other hand, Polypodium incanum, 

 Ch. tomentosa, Ch. gracilis, Aspl. montanvm, A. pinnatifidurn 

 and Schizcea pusilla are pretty surely beyond our reach. We 

 have left to us but two Canadian ferns not noticed by Mr. Eaton, 

 W. hi/pcrborea R. Brown, and Aspl. viride Hudson, but as the 

 first-named has been found on Willoughby Mountain by Mr. 

 Horace Mann, and the latter is most probably a native of the 

 northern parts of Maine, etc., Mr. Eaton might as well have 

 included them and thus had the opportunity of fully revising his 

 former views on the genus Woodsia. Aspidium spinulosum has 

 been split up into four varietal forms — dilatatum, intermedium, 

 verum, and Boottii, the var. intermedium {Aspd. intermedium 

 Willd.) being our common narrow form; this would seem to be a 

 somewhat too minute subdivision. The large broad form of J.. 

 cristatum which we have been calling var. majus is here named 

 var. Clintonianum, in compliment to Judge Clinton of Buffalo. 

 The var. Braunii of A. aculeatum is hardly entitled to '-black 

 letters/' it being merely a form of the var. angulare — the .1. 

 angulare of Willd. etc. — unless on the supposition that this latter 

 is a good species. The plates being unaltered, the genera Allosorus 



