OF WESTCHESTER COUNTY. 793 



S. csesia, L. Open woods. 

 S. speciosa, Nutt. 



Var. angustata. (Bicknell.) 

 S. puberula, Nutt. Sandy fields. 

 S. rigida, L. Along fence rows. 

 S. sempervirens, L. Rye, borders of salt marsh, 

 S. elliptica. .lit. Borders of salt marsh, Rye. 

 S. neglecta, T. & G. Wet places. 

 S. patula, Muhl. Swampy places. 

 S. arguta, Ait. Thickets. 



Var. juncea, G. Thickets, 

 S. Muhlenbergii, T. & Gray. Edges of woods. 

 S. linoides, Solander. Swamps. 

 S. altissima, L. Along fences. 

 S. ulmifolia, Mulil. Damp thickets. 

 S. odora. Ait. Peekskill. (Le Roy.) 

 S. nemoralis, Ait. Fields and road-sides, common. 

 S. Canadensis, L. Fields and road-sides. 

 S. serotina, Ait. Damp grounds, 

 S. gigantea, Ait. Along fences. 

 S. lanceolata, I^. Damp grounds. 

 S. tenuifolia, Pu'-sh. Rye. near the coast. 



Inula, L. (Elecampane.) 



la. Helenium, L. Road-sides, near dwellings. (Nat. Eu.y 



Pluchea, Cass. 



P. camphorata, DC. Along the coast. 



Baccharis, L. (Groundsel-Tree.) 



B. halimifolia, L. (Leggett.) 

 Iva, L. (Marsh Eld'-r.) * 



I. frutescens, L. Salt meadows. 



Ambrosia, Tourn. (Rag-weed.) 



A. trifida, L, Fields. 



A. artmisiaefolia, L. Said to be the plant whose pollen causes the disease 

 called Hay Fever. In confirmation of this belief, the following statement was made 

 to me by Rev. Dr. Samuel Lockwood, who is a sufferer. I give, as near as I can 

 recollect, his own words : In a walk through the fields I came to a wheat stubble 

 covered with a dense growth of Ambrosia, artimisixfolia, in a state just ready i> 

 discharge its pollen. I hestitated, but finally concluded to cross ; at once I found 

 great difficulty in breathing and when I reached the other side, I was completely 

 prostrated and was obliged to sit for some time, and the experiment was followed by 

 one of the most severe attacks of Hay Fever I have ever experienced. 



Xanthium, Tourn. (Cocklebur.) 



X. strumarium, L. Spyten Duyvil, (Leggett.) 



Var. echinatum, Gray. 

 Y. spinosum, L. Coast. (Nat. from the south.) 



