51 



pleasure In dedicating it to one pre-eminent in American Botanical 

 Science. 



Through the kindness of Mr. Faxon I am enabled to accompany 

 ray description of the new fern with an admirable drawing, of which 

 I append the following explanation : 



Figure i, plant natural size; Figure 2, pinn?e enlarged; Figure 

 3, pinnule more enlarged; Figure 4, segment of pinnule showing 

 venation; Figure 5, sporangium x 90 diam.; Figure 6, spore x 250 

 diameters; 7. scale from rachis of pinna x 25 diameters. 



Medford^ Mass., JpriV 20, 1880 



Geo. E. Davenport, 



40. Some of the rarer Plants of our Northern suburbs. 



By Eugene P. Bicknell. 



In the following paper, designed to illustrate some features of the 

 flora of. our northern suburbs, I have confined myself to a formal 

 enumeration of species the occurrence of which seems to be of 

 more or less interest. The principal field of my observations has 

 been a limited one, confined to a section of country about half a 

 mile wide, extending inland about two miles from the station of the 

 N. Y. C. &: H. R. R., at Riverdale. This region is all embraced 

 within the limits of the 24th Ward of this city, and the water-shed 

 of the Hudson, and where not otherwise specified, the observations 

 apply to it. Occasionally they have been carried on in my neighbor- 

 ing districts, the extreme points of which may be represented by Ft. 

 Washington and Fordhani, on the S. W. & S. E., and a little beyond 

 the limit of this city on the north. 



The general order of the list follows that of Gray's ** Manual. 



It 



Anemone Pennsylvanica, L. A bed of this plant grows at the foot 



of a lightly wooded slope to the Hudson River just above 

 Spuyten-Duyvil. Here I found them in full flower, June 5th 

 last. Also at Sing Sing, some miles from the river. 



Thalictrunri purpurascens, L., var. ceriferum, Aust. Sparingly, in 



woods just beyond the city limits, about 2 miles from the river. 

 Just in flower, June 8, 1879. 



Nuphar luteum, Smith, var. pumilum, Gray. Grows in inlets of 

 the Bronx River, along Harlem R. R., above Williams Bridge. 



Fumaria officinalis, L. A single plant near the track of the Hud- 

 son River R. R. 



Dentaria diphylla, L. Growing commonly along the bed of abrook 

 flowing into the Hudson, between Spuyten-Duyvil and River- 

 dale. In recent flower, May 10, 1879. 



D. laciniata, Muhl Grows abundantly within an area several yards 

 in extent, in a glen close to the river. In full flower, May 

 8, 1879, 



Barbarea praecox, R. Br. Growing along a fence, on a grassy 



slope about f mile from river. Pods an inch long, April 19, 1878. 

 Sisymbrium Thaliana, Gaud- Common at several places. Plants 



with small pods, May 4th, 1879. 

 Hesperus malronalis, L. Along the roadside at Nasholon ; also in 



