100 Bulletin Wisconsin Natural History Society [Vol. 11, No. 3 
has been collected in Racine County and by Mr. Schuette in Brown 
County. Luxuriant forms collected by the writer in Racine 
County, by Mr. William Finger in Waukesha County and by Mr. 
Schuette in Brown County, are suggestive of A. commutatus (T. & 
G.) Gray, in the larger size of the heads and leaves, but lack the 
number of rays characteristic of that species. 
A. vimineus var. foliolosus (Ait.) Gray 
A. vimineus var. saxatilis Fernald 
The type of this species has not been observed by the writer in 
this state. Plants collected by Mr. William Finger in Monroe and 
Trempealeau Counties are referred to the variety foliolosus. The 
variety saxatilis has been collected in Outagamie and Ozaukee 
Counties. Plants intermediate between A. vimineus and A. Tra- 
descanti are not uncommon in Outagamie, Sheboygan, Ozaukee, 
Columbia, Milwaukee and Kenosha Counties, but are not easily 
referable to either species. 
A. lateriflorus (L.) Britton 
A. lateriflorus var. glomerellus (T. & G.) Burgess 
A. lateriflorus var. thyrsoideus (Gray) Sheldon 
A. lateriflorus var. bifrons (Lindl.) Gray 
A. lateriflorus var. pendulus (Ait.) Burgess 
A. lateriflorus var. horizontalis (Desf.) Burgess 
All the above named forms of A. lateriflorus seem to occur in 
eastern Wisconsin, as well as several others which refuse to sub- 
scribe to any of the foregoing denominations. The variety 
glomerellus is simply a form with shortened or aborted branches. 
Similar forms occur of the variety pendulus and A. hirsuticaulis. 
A single specimen, which is assigned to the variety thyrsoideus , 
was collected in the railroad yards near Mitchell Park in the city 
of Milwaukee. The variety bifrons occurs in Outagamie, Mil- 
waukee and Waukesha Counties; the variety pendulus in Outa- 
gamie, Sheboygan, Ozaukee and Milwaukee Counties; variety 
horizontalis, with extremely floriferous branches, in Outagamie, 
Ozaukee and Sauk Counties, a specimen from the last named 
county having been collected by Prof. A. B. Stout and given by 
him to the writer. 
