ioo Staten Island Association of Arts and Sciences 



from the evolutionary standpoint, and is illustrated by the figures 

 on plate 13. 



Several new types of the genus Pinus are also described, one 

 of which is distinguished as P. triphylla in the explanation of 

 figure 17 on plate 14, and is therefore presumably to be con- 

 sidered and cited as a new species, under that name. 



The illustrations are excellent and the author's discussions and 

 interpretations of the facts of internal structure which they show, 

 add much that is both new and interesting in relation to the 

 antiquity and ancestry of the Abietinese and the genus Pinus; 

 but, unfortunately, the scientific value of the contribution is 

 seriously marred by the lack of orderly sequence in the arrange- 

 ment of descriptions, discussions, names, and references in the 

 text, and by the careless or erroneous citations of authorities. 



A. H. 



New Ferns Described as Hybrids in the Genus Dryopteris 3 



The recent activity in the study of hybrids, both- plant and 

 animal, has received a notable contribution in this paper by Dr. 

 Do well, and it is of special interest to us, not only as coming 

 from one of our own members but also for the reason that the 

 material upon which it is based was largely obtained from Staten 

 Island. 



Six hybrids are recognized as referable to the genus Dryopteris, 

 in which the species cristata, spinulosa, intermedia, clintoniana, 

 goldiana, and marginalis are concerned. Three of these are de- 

 scribed as forms not heretofore recognized, viz., D. clintoniana X 

 intermedia, D. goldiana X intermedia, and D. goldiana X mar- 

 ginalis, and two now regarded as hybrids were previously classed 

 as species or varieties, viz., D. cristata X intermedia = D. boottii 

 (Tuck.) Und. and D. clintoniana X goldiana = Z). goldiana ce-lsa 

 Palmer. The remaining one is D. cristata X spinulosa (Milde) 

 C. Off; 



The several characteristics are clearly described and the facts 



3 By Philip Dowell. Bull. Torrey Club 35 : 135-140. 1908. 



