74 Monography of the North American Cuscutinee. 
very variable species. 'The stamens and pistils are as long, or 
rather a little shorter than the corolla, but the latter are elongated 
after flowering. (Cuscwta Americana, Hooker?) 
4. Cuscuta Saururi.—lt is very probable that Cuscuta wmbro- 
sa, Beyrich, ex Hooker, is the same ; which name must therefore 
be substituted for mine, though not quite appropriate. ‘This plant 
is very nearly related to the former species, but can always be dis- 
tinguished by the more open, campanulate corolla, which in C. 
vulgivaga is globose-campanulate, the thinner texture of calyx 
and corolla, which is destitute of the pellucid dots, and the oblong 
lobes of calyx and corolla, which are always more or less orbicu- 
lar in C. vulgivaga. Large, overgrown specimens of C. vulgz- 
vaga have sometimes the lobes of calyx and corolla as long as 
the tube, but can always be recognized by the above characteris- 
tics. Such specimens are those from Alabama and Texas, men- 
tioned in this Journal, Vol. xu, p. 340. The true C. Saururi 
I have only received from western New York, and from this 
neighborhood ; where it grows in abundance on Polygonum, Sau- 
rurus, etc. in a few localities. 
I must mention here two specimens of a Cuscuta received from 
Mr. M. A. Curtis, collected, one in Massachusetts, the other in 
North Carolina. In their principal characters they agree with C. 
Saururi, but the flowers are much smaller and frequently 4-part- 
ed; the linear oblong, obtuse lobes of calyx and corolla are rather 
longer than the tube; the filaments subulate, shorter than the limb ; 
ovary with a stylopodium; styles short and thick; capsule ? 
An examination of more complete specimens and the living 
plants must show whether there is a constant difference between 
this eastern plant and the western C. Saururi. But I may here 
remark, that the eastern form of C. vulgivaga is also mnch 
smaller than our western form, and from Connecticut I have also 
received a tetramerous C. vulgivaga ! 
5. CuscutTa verrucosa.—Under this name I have confounded 
two Texan species: the description is chiefly taken from the fol- 
lowing species, but the figure refers to this one, which was first 
collected by Drummond and afterwards by Mr. Lindheimer, both 
times on Petalostemon multifiorum. The description must be 
altered :—C. verrucosa, cymes umbelliform, compound ; flowers 
peduncled (small), 5-parted; calyx campanulate, verrucose ; seg- 
ments ovate, somewhat obtuse, shorter than the globose-campa- 
