340 Monography of the North American CuscutinecB. 



the obtuse segments of the calyx ; stamens as long as the limb ; 

 the scales pinnatifid-laciniate, convergent, covering the ovary ; 

 styles as long as the ovate-globose ovary with the stylopodium ; 

 remains of the corolla persistent at the base of the subglobose 

 capsule. 



Margin of lakes and swamps, in the " American Bottom" op- 

 posite St. Louis, on Saururus, where it was discovered in Sep- 

 tember, 1841, by my friend, Ch. Geyer, the indefatigable botanist 

 who has signalized himself in the North Western Expedition of 

 Mr. J. N. Nicollet in 1839. Alabama, Dr. A. Prout. Texas, on 

 Boehmeria, Polygonum, &c., F. Lindheimer. A variety with 

 rather larger calyx-lobes, in other respects perfectly agreeing with 

 the above description, was obtained by Dr. A. Gray, in Western. 

 New York, (also on Saururus ?) 



This species bears a great resemblance to 0. Polygonorum ; 

 but differs from it in the much stouter stems, the greater size of 

 the flowers, the larger convergent scales, and the stylopodium on 

 the ovary. The stems are one third of a line or more in diame- 

 ter, and are stouter than in any other of our species. It is the 

 latest species in blossom, the flowers not appearing before the 

 beginning or middle of September ; while C. Polygonorum com- 

 mences in August, and C. Cephalanthi and C. Coryli, which are 

 the earliest flowering species of our neighborhood, are in bloom 

 by the end of July. 



5. CUSCUTA PENTAGONA, 71. Sp. 



Stem branched ; flowers pedunculate, subumbellate, small, 

 5-parted ; tube of the corolla open campanulate, shorter than the 

 long acuminate lobes, and the smooth, roundish, obtuse lobes of 

 the 5-angled calyx ; stamens shorter than the limb ; the scales 

 ovate, fimbriate, convergent ; styles filiform, about equal to the 

 globose ovary ; capsule . 



On Euphorbia or Tragia, Norfolk, Virginia, Mr. Rugel ; com- 

 municated by Dr. Gray. Also near Houston, Texas, on dilferent 

 low herbs in a wet prairie ; flowering in April, F. Lindheimer. 

 Beardstown, Illinois, in sandy soil, Ch. Geyer. 



This species bears some resemblance to the 0. Polygonorum, 

 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 5-angled calyx, whose lobes are not triangular, 



