46 Rhodora [Marcu 
from A. nemorosum and as to just what forms the authors of A. nemoro- 
sum, pubens, and intermedium had in mind when these names were pub- 
lished. The confusion in Great Britain, especially, is well summed up 
by Beeby in the Journ. Bot. xlvi. 380-382 (1908), who concludes after 
a study of authentic specimens of Lange’s A. intermedium, that his 
species, so far as those specimens are concerned, consists of two forms: 
“first, a rather large-headed form of A. minus corresponding to var. pur- 
purascens Blytt,” and ‘secondly, the hybrid A.majus X minus.” Beeby, 
in his study of the genus Arctium, also obtained a presumably authen- 
tic specimen of 4. nemorosum collected by Lejeune himself and found 
it to be a form with heads agglomerated and almost sessile, rather 
than long-peduncled, and therefore agreeing both with the original 
description and also with the interpretation of most recent authors 
except Rouy & Foucaud. He says “I very much doubt whether we 
have any fourth species [in Great Britain] to support the name A. 
pubens Bab. If so, I am unacquainted with it, though I believe that 
Messrs. Groves are satisfied of the existence of such a plant." 
Among our American forms the one here treated as A. nemorosum, 
form a agrees most closely with what the type is supposed to be. 
The form e, on the other hand, agrees fairly well with the description 
of A. intermedium Lange and A. pubens Bab.; but considering the 
doubt in the minds of European authors as to the exact status of 
these names and also the fact that, in America at least, the form 
here called form b combines characters of both form a and form c, it 
seems unwise at present to attribute any names whatever to the three 
forms here described. Whether they are really distinct forms, and 
what relation they bear to the above names cannot be determined 
with our present inadequate knowledge. 
(a) Heads sessile or subsessile, the uppermost tending to be clus- 
tered: involucre glabrous to slightly arachnoid. — Typical specimens. 
MAINE: around dwellings, Orono, September, 1889 (Fernald). New 
HAMPSHIRE: near dwellings, Jaffrey, July 27, 1897 (B. L. Robinson). 
MassaAcHUsETTS: Springfield, August 17, 1904 (L. Andrews). RHODE 
Istanp: Providence, September 19, 1899 (J. R. Churchill). CoN- 
NECTICUT: roadside, Southington, August 25, 1904 (L. Andrews). 
InumNOo:s: waste places, St. Clair Co., August 14, 1893 (H. Eggert). 
Kansas: woods, Riley Co., August 24, 1895 (J. B. Norton, no. 307). 
(b) Heads scattered and peduncled: involucre glabrous or essen- 
tially so. — Typical specimens, QuEnEc: vicinity of Cap à L'Aigle, 
July 27, 1905 (J. Macoun, no. 68,237). Maine: Pembroke, July 23, 
1909 (F ernald & W iegand); Manchester, September 9, 1873 (F. L. 
Scribner). 
