32 ILLINOIS BIOLOGICAL MONOGRAPHS [122 



Specimens examined: Mexico: Oaxaca; Oaxaca (Karwinski in 1827, taken as the type, a 

 specimen in the Engclmann Herb.), Between Victoria and Rio Blanco (Karwinski in 1842). 

 Jalisco (Pringle 4529, Pahner 579, Rose & Painter 7473). Puehla; Tehuacan (Purpus 5708), 

 Puebla (Purpus 3553). Coahuila &" Neuvo Leon (Palmer 918). San Luis Potosi; San Luis 

 Potosi (Parry & Palmer 631, Palmer 87, Schaffner 377, 781, labelled C. zacatlasculi n. sp., 

 Gregg 570). Qucretaro; Queretaro (Rose & Rose 11150). 



Guatemala: (Heyde 287), Quiche (Heyde & Lux 2912), Totonicapam (PLehmann 

 1682). 



Cuscuta tinctoria kellermaniana n. var. 

 [Figure 16 f-g] 



Scales oblong, quite sparingly fringed, bridged at about a third of their 

 height; styles shorter than the globose-depressed ovary and capsule. 



Type locality: Volcano Agua, Guatemala. 



Specimens examined: Guatemala: Volcano Agua (KeUerman 7567, the t>-pe, in the 

 New York Bot. Card. Herb.). 



Ciiscuta floribunda Humboldt, Bonpland & Kunth 



[Figure 10] 



C. floribunda Humboldt, Bonpland & Kunth, Nov. Gen. et Sp., 3:96, 1818. Choisy, Mem. 

 Soc. Phys. et Hist. Nat. Geneve, 9:283, 1841; and in DC., Prodromus, 9:459, 1845. 

 Engelmann, Trans. Acad. Sci. St. Louis, 1:481, 1859. 



Flowers about 4 mm. long; calyx lobes orbicular, obtuse, overlapping, 

 shorter than the corolla tube; corolla cylindrical; lobes ovate-oblong, obtuse, 

 between one-half and three-quarters as long as the tube, reflexed; scales 

 somewhat triangular, reaching the filaments, rather sparingly fringed with 

 medium length processes; filaments subulate; anthers ovate. Capsule 

 globose with a thickened apex and ridge or collar about the intrastylar 

 aperture; styles longer than the capsule. Seeds not seen. 



The fragment of the type from which this description is drawn is in the 

 Engelmann herbarium. It apparently possesses characters that distin- 

 guish it from all others. 



Type locality: "in calidis Novae Hispaniae, prope pontem Istlae." 



Specimens examined: At the Bridge of Istla, western Mexico (Bonpland, the type, a 

 fragment in the Engelmann Herb.). 



Cuscuta americana Linnaeus 

 C. americana Linnaeus, Spec. PL, p. 124, 1753. Choisy, Mem. Soc. Phys. et Hist. Nat. 



Geneve, 9:282, pi. 4, fig. 4, 1841; and in DC, Prodromus, 9:459, 1845. Engehnann, 



Trans. Acad. Sci. St. Louis, 1:482, 1859. Progel in Martius, Flora Brasiliensis, 7:376, 



pi. 126, fig. 1, 1871. 

 Nemepis americana Rafinesque, Fl. Tellur., 4:91, 1836. 

 ?Nemepis prolifera Rafinesque, Fl. Tellur., 4:91, 1836. 

 ?Dastylepis brownci Rafinesque, Fl. Tellur., 4:125, 1836. 

 ?Eronema robinsoni Rafinesque, Fl. Tellur., 4:125, 1836. 



Stems medium to coarse. Flowers glabrous, 2.5-4 mm. long, pentam- 

 erous, subsessile in cymose, racemose, compact or somewhat loose clusters; 

 calyx tubular, as long as or somewhat shorter than the corolla tube; lobes 

 ovate-orbicular, overlapping, obtuse, short; corolla cylindrical, included 



