May 1906] PROCEEDINGS S. I. ASSN. ARTS AND SCIENCES. 65 



growth of this fern in the vicinity of New Springville was nearly de- 

 stroyed. 



28. Dryopteris cristata x marginalis Davenp. — This was first report- 

 ed in the Proceedings of Jan. 1904 from near South Avenue. Before 

 the end of last year (Dec. 2-7) I found a plant of this fern back of 

 Richmond. I found quite a number of fine plants of this fern in a 

 swamp near Suflfern, N. Y., last summer, but to my knowledge the 

 fern has not hitherto been reported as abundant anywhere; so we may 

 count ourselves fortunate in having this fern on Staten Island. 



29. Dryopteris Pittsiordensis Slosson. — This is my rarest find, thus 

 far. on Staten Island, since this is a new fern of which only a few 

 plants are known. It was first described in Rhodora, vol. vi, p. 75. 

 (April 1904) and first reported from the Island in the Proceedings, vol. 

 ix, p. 42. March 1905. Further comments on this fern are given by 

 Professor L. M. Underwood in his American Ferns, vi, p. 197. 1906. 

 (Reprint from the Bull. Torrey Club, vol. xxxiii, p. 197, 1906). 



30. Dryopteris Boottii (Tuckerm.) Underw. — Boott's fern was re- 

 ported in the Proceedings of Nov. 14, 1903 from near South Avenue 

 (vol. ix, p. 2). Specimens have since been collected near Bradley 

 Road, Bull's Head, Richmond, and in the previously mentioned swamp 

 above Reed's Basket Willow Swamp. Some of these specimens belong 

 to the form or variety of this fern described by someone, I do not 

 know the author, as Nephrodiiun Boottii var. multifloruvi. In our 

 nomenclature this would read Dryopteris Boottii multiflora. 



31. Filix fragilis (L.) Underw. — The brittle fern was originally re- 

 ported as abundant near Egbertville. In the fall of 1902 I remember 

 finding it along the north slope of Richmond Hill along the Egbert- 

 ville Road. Last summer I searched this place without finding a single 

 specimen of this fern where it seemed rather abundant in 1902. The 

 only other place I have found the fern on the Island is Bloodroot \'al- 

 ley, where it is still quite abundant. 



32. Woodsia obtusa (Spretig.) Torr. — This is one of my rarest finds 

 on the Island; although the plant must have been not rare in the local- 

 ity near Egbertville, from which it was reported in the original list 

 without comment. Last summer I succeeded after careful search in 

 finding one poor plant in the original locality on Richmond Hill near 

 Egbertville, and one or two rather dwarf specimens in Bloodroot 

 Valley. 



The variety of D. spinulosa which I reported last year as var. dilatata 

 I have purposely omitted since it is not authentic dilatata. 



This gives us a list of at least 30 species of ferns from Staten Island 



