HOLOGRAPHY OP THE NORTH AMERICAN CUSCUTINEiE. 63 
This species bears some resemblance to the 0. Pofygonorum, to which it is related by the campanulate flower 
and the acute lobes of the corolla; but is easily distinguished by the small size of the flowers, the 6-angled 
calyx whose lobes are not triangular, but roundish and obtuse. The angles are formed by the margins of the [34l] 
lobes of the calyx and correspond with the petals, while in C. Coryli the five angles formed by the five 
prominent midribs alternate with the lobes of the corolla. 
6. Cuscuta verrucosa, n. sp.: stem low, branching ; cymes loose, few-flowered; flowers (small) long-peduncled, 
5-parted ; tube of the corolla campanulate, shorter than, the lanceolate acuminate lobes, and nearly equal to the ovate 
subacute segments of the verrucose or somewhat hispid calyx; scales ovate, fimbriate, equalling the tube ; styles as 
long as the ovary; capsule globose, surrounded at the base by the persistent corolla. 
Var. a. hispidula : inflorescence, and frequently adso the branches, hispid or glandular-pilose; lobes of the 
calyx acute, shorter than the tube of the corolla* 
/3. glabrior : cymes more or less- glabrous ; lobes of the calyx broader, somewhat obtuse, nearly as long as the 
tube of the corolla. 
Texas: var. a. in dry sterile prairies, west of Houston, on Euthamia, Schrankia, Aster, Ambrosia, Evolvulus, 
and other low herbs; flowering in April and May, F. Lindheimer. /3. with the preceding variety, F. Lindheimer: on 
Petalostemon, Drummond (3d collection, No* 247). 
This species is the lowest of all the American Cuscutse, and has, together with the foregoing, the smallest flowers. 
It grows on open prairies, in dry soil. In all these respects, therefore, it takes in Texas the place of Cuscuta Epithy- 
mum in Europe. Like that species, it is not restricted to a few plants, but appears to creep over everything in its way. 
It is the only Cuscuta known to me with any appearance of pubescence. 
Stem from 4 to 6 inches high, smooth (/$.) or more or less hispidly pubescent with pellucid vesicular hairs, 
(a.) especially in the inflorescence; peduncles filiform, many times longer than the flowers; calyx always rough, but the 
vesicles less hair-like, more glandular, or when dry like warts. In flowering, the calyx is campanulate, or even somewhat 
turbinate, but soon after assumes a hemispherical shape,, which is the one figured in the plate. Lobes of the corolla 
very acute, spreading, white ; after flowering the tips incurved, turning brown. Stigmas globose, purplish-brown. 
This Texan species is nearly related to C* pentagona-: the size of the flowers, shape of corolla and the [342] 
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. Cuscuta Polygonorum, n. sp. ;: stem low, branching'; flowers subsessile, glomerate, mostly 4-parted ; tube of 
the corolla campanulate, nearly equal to the acute campanulate or spreading lobes and the acutish segments of the 
calyx; stamens as long as the limb; the scales mostly bifid, laciniate, 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, Penthorum, and other plants in the neighborhood ; August 
and September. 
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 
E. 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 Ambrosia?, with Bidens, Spartina, etc. 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 0. Saururi are easily distinguished from the others by their orange-colored stems, their larger open 
campanulate flowers, 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 appressed to the corolla, so that the large depressed ovary appears naked in the open tube, while in 
0. Saururi it is covered by the convergent or inflexed multifid scales. 
Note. — Since the manuscript of this article has been communicated to the American Journal, my attention has been 
directed to one or two species of Cuscuta indicated by the late Mr. Beyrich, and mentioned by Sir William Hooker in his [343] 
excellent Flora Boreali-Americana (Vol. II. p. 77), and in the first volume of the Companion to the Botanical Magazine. 
C. umbrosa of Beyrich, in herb. Hook. (FI. Bor.-Am., 1. c.), from Canada, the Northwest Coast, as well as the United States, 
I am unable to determine from the characters given. It may be either my C. Saururi, or C. vulgivaga, & glomerata: the length of the 
styles does not appear to afford constant characters in this genus. 
C. arvensis of Beyrich, in herb. Hook. (C. Americana? Hook. FI. Bor.-Am. t 1. c.), is perhaps my C. vulgivaga, a. laxiflora. 
According to Hooker, Douglas collected it in Oregon. 
C. coronata of Beyrich, infherb. Hook., is enumerated but not characterized in Hook . Compan. to Bot. Mag. y I. p. 173 (New 
Orleans, Drummond, 1833), on tfifc stems of Laurus Carolinensis. 
C. Epilinum, Weihe, has been introduced, with flax, into some parts of this country, especially Chester County, Pennsylvania; 
fide Darlington , Flora Cestnca , ed. 2. 
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cm 
7 8 9 10 Missouri 
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