200 | Rhodora [NOVEMBER 
“815. connata, Muhl. Belle Isle, ete. Common and variable: 
leaves undivided incisely-cut or -serrate (the type); or pinnately 
three divided with the terminal division petioled, 
816. var. petiolata, (Nutt.) (B. petiolata, Nutt. Jour. Acad. Philad. 
2:190)! 
Nevertheless, in spite of Mr. Farwell’s complete reversal of the 
proper names of the two plants, the name-bringing synonym, Bidens 
petiolata Nutt., must be taken as the basis of the preceding combi- 
nation and the plant which was so clearly described by Nuttall must 
stand as the type of the var. petiolata.’ 
The two extremes of Bidens connata may be distinguished as follows. 
BipENs соххата Muhl. in Willd. Sp. iii. 1718 (1804). B. connata, 
var. petiolata Farwell, Ann. Rep. Comm. Parks and Boulevards 
Detroit, xi. 91 (1900) as to plant described, not B. petiolata Nutt. 
At least the primary cauline leaves three-lobed, the two lateral oblong 
lobes broad-based and conspicuously decurrent to the broadly mar- 
gined petiole; the uppermost and rameal leaves usually unlobed, 
subsessile or with short margined petiole.— On shores and in swamps, 
Quebec to Massachusetts and Michigan and doubtless southward. 
Less common westward than 
Var. PETIOLATA (Nutt.) Farwell, Ann. Rep. Comm. Parks and 
Boulevards Detroit, xi. 91 (1900) as to name-bringing synonym 
but not as to plant described. В. petiolata Nutt. Jour. Acad. Nat. 
Sci. Phila. vii. pt. 1, 99 (1834). АП or nearly all the leaves unlobed, 
tapering to slender or narrowly margined petioles.— Common from 
Maine to Minnesota and Kansas. 
BrpENS TRIPARTITA L. 
As already noted, the discovery at several stations in Europe of the 
American Bidens connata has given rise to considerable discussion 
among European botanists, and since it was first called to notice 
many additional stations have been reported. It is, therefore, in- 
teresting to record the occurrence in North America of the European 
B. tripartita L. of which B. connata Muhl., B. frondosa L., and B. 
vulgata Greene are the common American representatives. 
In August, 1904, while visi ing Percé, Gaspé Co., Quebec, with 
1 Farwell, Ann. Rep. Comm. Parks and Boulevards Detroit, xi. 91 (1900). 
2 There is a slight possibility that Bidens tripartita L., var. ? fallar Warnstorf, Verhandl, 
bot. Vereins für Brandenburg, xxi. 157 (1879), is the same as В. connata, var. petiolata, 
for Warnstorf describes it with * meistens ungetheilten Stengelblütter"; but he later 
(Bot. Gaz. xxv. 58) states that his plant matches Muhlenberg's type of B. connata in the 
« Willdenow herbarium. 
