342  Monography of the North American Cuscutinee. 
This Texian species is nearly related to C. pentagona: the size 
of the flowers, shape of corolla and the scales, are the same ; but 
it is easily distinguished by the loose and few-flowered cyme, 
and by the tuberculate or hispid-campanulate (not pentagonous, 
smooth, and membranaceous) calyx. 
7. Cuscura Potyconorum, 7. sp. 
Stem low, branching; flowers subsessile, glomerate, mostly 
A-parted ; tube of the corolla campanulate, nearly equal to the 
acute campanulate or spreading lobes, and the acute segments of 
the calyx ; stamens as long as the limb ; the scales mostly bifid, la- 
ciniate, appressed ; styles as long as the depressed ovary ; remains 
of the corolla persistent at the base of the depressed capsule. 
On different species of Polygonum, also on Lycopus, Pentho- 
rum, and other plants in the neighborhood. August and Sep- 
tember. 
This is a much lower plant than C. Saururi, etc., with orange 
colored stems, twining round the Polygona in overflowed places, 
the bottoms of sink-holes, or margins of ponds, west of St. Louis, 
where in the year 1839 my friend F'. Lindheimer, now in Texas, 
to whose zeal and kindness I owe many specimens from that 
interesting country, first discovered it. In the following year, I 
found it on the banks of Illinois river, near Peru, in thickets 
formed by immense Ambrosie, with Bidens, Spartina, ete 
Whether any Polygonum was there I cannot recollect, having 
at the time paid no particular attention to this point. The flowers 
of the specimens from Peru are a little more peduncled, and the 
very acute segments of the calyx rather longer than the tube of 
the corolla; but I observe no other difference. 
This and C. Saururi, are easily distinguished from the others 
by their orange-colored stems, their larger open campanulate flow- 
ers, with the remains of the corolla always at the base of the 
capsule. The scales of the filaments in C. Polygonorum are 
intermediate between C. Coryli and C. Cephalanthi in shape; 
but are more laciniate than in the former. ‘They are appress 
to the corolla ; so that the large depressed ovary appears naked 
in the open tube ; while in C. Saururi it is covered by the com 
vergent or inflexed multifid scales. 
" Noré.<Sinee the manuscript of this article has been communicated to the 
