1924] Wiegand,—Some Changes in Nomenclature 5 
lilac instead of violet-blue rays, about 35 instead of 50 disk flowers 
and straighter less spreading involucral bracts. The two species 
when growing together would rarely be confused. Gray cites A, 
lucidus Wend. as a synonym, but neither de Candolle nor Nees von 
"Esenbeck was clear as to the identity of Wenderoth’s plant, and 
Gray gave no reasons for his interpretation. The original description 
of Wenderoth is not convincing. A. lucidus Wend. is antedated by 
A. lucidus Moench, which also is difficult to interpret. 
BIDENS FRONDOSA L., var. pallida Wiegand, comb. nov. B. melano- 
carpa pallida Wiegand, Bull. Torr. Bot. Club xxvi. 406 (1899). 
The taxonomic status of the plants included originally under this 
variety is not clear. They have the appearance of hybrids, also of 
ecological forms. Sporadic plants of this type still are found about 
Cayuga Lake. 
ARCTIUM MINUS Bernh., var. corymbosum, var. nov. 4. nemorosum 
(b) and (c) Fernald & Wiegand, Ruopora xii. 46 (1910).— Capitulis 
plus minusve corymbosis. 
Heads more or less corymbose instead of subspicate. Native of 
Europe and widely scattered in the New World. 
Authors have variously interpreted this form as the Lappa vulgaris 
Hill or L. intermedia Lange.! Hill's plate might represent this form 
but has more the appearance of A. Lappa. Lange’s illustration in 
Flora Danica might be interpreted as our form or as a chance extreme 
of A. minus, but his description definitely calls for racemose heads, 
and Reichenbach so figures them. Also A. minus, var. paniculatum 
Lange? would not seem to be quite our plant. As no name has been 
found which applies with reasonable surety to the plant in question 
a new name is here proposed. Much of the material of this variety 
in the Herbarium of Cornell University has the aspect of a hybrid 
between A. Lappa and A. minus, but whether this is its true origin 
cannot be said. In 1910 Fernald and Wiegand (l. c.), following some 
European authors, retained A. nemorosum Lejeune as distinct from 
A. minus (Hill.) Bernh. In the opinion of the writer, observations 
in the field since that time have not tended to support this view, as 
the projection of the florets beyond the involucre varies much in the 
same plant, and the achenes vary in color, especially in the proportion 
of light and dark markings. It seems best to treat these forms all as 
A. minus. 
CORNELL University, Ithaca, N. Y. 
1 Evans, Jour. Bot. li. 113 (1913). 
? Lange, Dansk. Fl. ed. 4, 357 (1886). 
