22b. Cuscuta gronovii Willdenow var. latiflora Engelmann, Trans. Acad. Sci. St. Louis. 1: 508. 1859.
[E W]
Cuscuta saururi Engelmann, Amer. J. Sci. Arts 43: 339, plate 6, figs. 17–21. 1842
Calyces equaling corolla tube length, lobes oblong to ovate, bases barely overlapping. Corollas: tube broadly campanulate, 1–1.5 mm, lobes 1/2 to equaling tube length. Capsules loosely surrounded by withered corolla.
Flowering Jul–Oct. Hosts: Acalypha, Bidens, Boehmeria, Cephalanthus, Decodon, Impatiens, Penthorum, Persicaria, Salix, Saururus, Sium, Solidago, and others; stream banks, mudflats, margins of wetlands, wet meadows, alluvial forests; 20–200 m; Ont., Que.; Ark., Conn., D.C., Ill., Ind., Iowa, Ky., La., Md., Mass., Mich., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., Tenn., Tex., Vt., Va., W.Va.
T. G. Yuncker (1932, 1965) indicated that var. latiflora has the same distribution as var. gronovii. Current herbarium data suggest that although the two varieties are sympatric over a significant portion of the flora area, var. latiflora has a narrower geographical distribution.
