40 ILLINOIS BIOLOGICAL MONOGRAPHS [130 



Cuscuta potosina typica 

 [Figures 28 a-f and 88] 

 Flowers commonly tetramerous. Corolla lobes connivent in fruit and 

 corolla carried at the apex of the somewhat ovoid capsule; filaments about 

 as long as or shorter than the anthers; scales scarcely reaching the filaments. 

 Type locality: Near San Luis Potosi, Mexico. Range: Central and 

 southwestern Mexico. 



Specimens examined: ]Mexico: San Luis Potosi; San Luis Potosi (Schaffner 779, 

 the type, in the Gray Herb.; 379). Queretaro (Rose, Painter & Rose 9650). 



Cuscuta potosina glohifera Schaffner, n. var. 

 [Figures 28 g-h and 87] 

 C. glohifera Schaffner in herb. 



Flowers larger, commonly pentamerous; filaments and scales longer. 

 Capsule depressed-globose, surrounded by the withered corolla. 



Type locality: Near San Luis Potosi, Mexico. Range: New Mexico 

 and Arizona to central and southern Mexico. 



Specimens examined: United States: New Mexico ^Arizona Territory (Rusby 295). 

 Mexico: (Pringle 7179). San Luis Potosi; San Luis Potosi (Schaffner 780, the type, 

 in the Gray Herb.; 378). Federal District (Pringle 6575), Tlalpam (Rose & Rose 11215). 

 PueUa (Purpus 5709). 



Cuscuta partita Choisy 

 [Figures 12, 118 and 156] 



C. partita Choisy, Mem. Soc. Phys. et Hist. Nat. Geneve 9:284, pi. 5, fig. 3, 1841; and in 

 DC, Prodromus, 9:460, 1845. Engelmann, Trans. Acad. Sci. St. Louis, 1:487, 1859. 

 Progel in Martins, Fl. BrasUiensis, 7:386, pi. 128, fig. 6, 1871. 



Stems rather slender. Flowers glabrous, about 1.5-2 mm. long, on 

 pedicels about as long as the flowers, in dense cymose panicles; calyx loose 

 about and more or less spreading away from the corolla; lobes triangular- 

 acute; corolla deeply furrowed along the line of stamen attachment, the 

 corolla bulging outward between the furrows; stamen attachment evident; 

 corolla lobes spreading, triangular-acute, nearly as long as the tube; scales 

 fimbriate, as long as the tube, bridged at about a third of their height; 

 stamens shorter than the lobes; anthers oval or roundish, shorter than the 

 filaments; styles filiform, longer than the globose ovary; stigmas capitate. 

 Capsule globose, bulging in the four quarters about the developing seeds; 

 seeds about 1.2 mm. long, four ordinarily produced in each capsule, round, 

 compressed; hilum oblong, transverse. 



Type locality: "Hab. in Brasilia apud Illheos." Type not seen. 

 Range: Reported only from the Danish West Indies. 



Specimens examined: West Indies: (Boldingh 7081). Curasao (Boldingh 5481, 

 Britton & Shafer 2915). 



Cuscuta desmouliniana n. sp. 



Stems slender. Flowers slightly papillate, about 2 mm. long, mostly 

 pentamerous or less frequently tetramerous, on pedicels as long as or longer 



