672 Harshberger: Plant formations of Nockamixon Rocks 



Mah 



min 



'P 



Solamim Dulcamara, 

 Datura Stramonium, 

 Convolvulus aii'ensis. 



ociisia\ 



Abutilon Avicennae {A. Theo- Plant ago lanceolata, 



phrasti), ^^^' ' 



Hypericum perforatum, Dipsacus sylvestns, 



Daucns Carota, Achillea Millefolium, 



Pastinaca sativa, Anthcmis Cotula, 



FoENicuLUM officinale, " arvcusis, 



EcJiium vulgare, ' ' Arctium Lappa, 



Bruncll a vulgaris, Artemisia Absinthium (pretty 



plcxicaule, well established), 



M 



Nep 



macnlatum, Cirsium lanceolatnm. 



U 



arvensi\ 



»< 



(TV 



Mentha rotundifolia, " Parthenium 



<< 



{( 



pip 



{M. spicatci), (established), 



ita, GaUnsoga parvitlora, 



ifolia, Tanacetum vulgare, 



i i 



hastata^ 



# 



HISTORIC SKETCH 



The Nockamixon Rocks have been visited by a number of 

 local botanists, who have spent a day or two in the study of 

 its interesting flora. Nothing has been published on this flora 

 except a short note by E. Newlin Williams, entitled ** Botan- 

 izing in the Delaware Narrows " which appeared in Meehan s 

 Monthly, March, 1897, pages 43 and 44. The flora of the Rocks 

 was first carefully studied by Professor Thomas C, Porter of 



Lafayette College, Easton, Pa. He 



J 



J. Bernard Brinton, M 



son Brown, Dr. C. D. Fretz, who notes some of the Nockamixon 

 plants in his " Flora of Bucks County," and by Dr. N. L. Britton. 

 The Torrey Botanical Club and the Philadelphia Botanical Club 

 made a joint excursion to the place on May 30, 1893, under the 

 leadership of Professor Thomas C. Porter. The Botanical Society 

 of Pennsylvania botanized here on Decoration Day, May 30, 1908, 

 under the guidance of Dr. Samuel P. Seese of Lansdale, Pa. 

 The writer has made three successive trips to the Narrows, viz., 

 on May, 30, 1908, June 30, 1908 and October 2-\, 1908, several 



*Dr. S. r. Seese, of Lansdale, Penasylvania, is authority for this list 



