134 Rhod(-)ra [June 



TRAGOPOGON 

 T. PKATKNsis, L. Herb. E. F. Williams, 189S. 



HIERACIUM 



H. AURANTIACUM, L. This plant, elsewhere a noxious weed, is apparently 



not spreading, as was feared. 

 H. scabrum, Michx. 



TARAXACUM 

 T. OFFICINALE, Weber. 



SONCHUS 



S. ASPER, Vill. 



S. ARVENSis, L. Mrs. Brucke, 1899. 



LACTUCA 

 L. Canadensis, L. 



L. Canadensis, L., var. integrifolia. Gray. L. suffittifolia. Ell. 

 L. hirsuta, Muhl. 

 L. leucophaea. Gray. L. spicata (Lain.) Hitchc. 



PRENANTHES 



P. trifoliolata, Fernald, var. nana, Fernald. Nabalui nana (Bigel.) DC. Col- 

 lected by Dr. H. H. Rusby in 1892 on the top of Willoughby Mountain 

 and not reported since that date. Herb. H. H. Rusby. 



P. altissima, L. Nabalus altissimus (L.) Hook. Very common. 



Readville, Massachusetts. 



