84 



THE FERX BULLETIN 



have opportunities for further experiment I shall not 

 offer an opinion. Gco/F. Atkifison, in Linnaean Fern 

 Bulletin, vol 4, p. 34. 



PTERIDOGRAPHIA. 



Pellaea gracilis ox Sandstone. — The slender 

 cliff brake (Pellaea gracilis or Cryptogramme Stel- 

 leri) is one of the ferns reputed to be strictly confined 

 to ledges of limestone rocks and its finding in any 

 other situation is always unusual, in fact, until re- 

 cently the only record of its occurrence on rocks of 

 different character was that for the vicinity of \Yau- 

 kon, Iowa, where it has been reported growing on both 

 the St. Peter's sandstone and the Trenton shales. To 

 this record must now be added that of Mrs. Charles 

 Beach, who recently gathered specimens. from a ledge 

 of sandstone in the Catskills of Southeastern New 

 York at an altitude of about 2000 feet. This is ap- 

 parently the second report of the fern on pure sand- 

 stone and the first report of the kind for the Eastern 

 States. The editor of this journal, however, found the 

 fern on shales containing some lime, in southern New 

 York. 



Trinomial Ferx Names. — For several centuries, 

 at least, we have been getting away from the use of 

 trimonials in the names of plants, except as they are 

 used to designate that sub-division known as the form, 

 variety or sub-species, but there still lingers in our 

 nomenclature of the ferns a considerable number of 

 names having three instead of two words in their 

 make-up and therefore not properly included in a 

 nomenclature asserted t:. be binomial. Among some 

 of those that readily come to mind may be mentioned 



