134 Rhodora [June 



TRAGOPOGON 

 T. I'RATKNsis, L. Herb. E. F. Williams, 1898. 



IIIERACIUM 



H. AURANTiACUM, L. Tliis plant, elsewhere a noxious weed, is a|)pMri'nlly 



not spreailintf, as was feared. 

 H. scabrum, Michx. 



TARAXACUM 

 T. OFFICINALE, Weber. 



SONCIIUS 



S. ASPER, Vill. 



S. ARVENSi.s, L. Mrs. Bnickc, 1899. 



LACTUCA 

 L. Canadensis, L. 



L. Canadensis, L., var. integrifolia, Gray. /-. sm^^ittifoUti, Ell. 

 L. hirsuta, Miihl. 

 L. leucophaea. Gray. /- spicnta (Lain.) Hitchc. 



PRENANTHES 



P. trifoliolata, Fernald, var. nana, Fernald. Nabalus mina (\i'\^c\.) DC. Col- 

 lected by Dr. II. H. Rusbj- in 1892 on the top of Willoii^hi)y Mountain 

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



P. altissima, L. Nnfialus a/itssitnus {h.) Hook. Very common. 



ReADVILLE, MASSACIUrSETT.S. 



THE IDENTITY OF MICHAUX'S LYCOPUS UNIFLORUS. 



M. L. Fernald. 



In a recent manual of the northern t^ora the plant which has gen- 

 erally passed as Lycopns virginicus., L., is divided into two leading 

 groups. The first with leaves mostly ovate and the base of the stem 

 not tuberous contains a single species, which is identified with reason- 

 able certainty as Z. virginicus ; the other group, with leaves mostly 

 lanceolate to oblong and with the bases of the stems tuberous, con- 

 tains plants which are treated without reservation as two new species : 

 L. conimufiis,^ a firm-leaved plant of '' moist soil," and Z. membranacea^ 



' Hicknell in Britton, Man. (1901) 803, 804. 



