44 ILLINOIS BIOLOGICAL MONOGRAPHS [134 



Stamens not exceeding the corolla lobes; scales somewhat shorter than 

 in var. subtilis but fully developed; flowers slightly smaller, densely papil- 

 lose. 



Type locality: Oaxaca, Mexico. Range: Southwestern Mexico. 



Specimens examined: Mexico: Oaxaca (Liebmann, taken as the type, a fragment in 

 the Engelmann Herb.)- Guerrero; Acapulco (Palmer 51, Herb. Le Jolis in 1866). 



Cuscuta lacerata n. sp. 

 [Figure 18] 



Stems slender. Flowers glabrous, pentamerous, about 2 mm. long, 

 on pedicels as long as or longer than the flowers in dense, congested, 

 paniculate cymes, the ultimate divisions umbellate; calyx exceeding the 

 shallow, campanulate corolla; lobes somewhat uneven, lanceolate, acumi- 

 nate, with scattered deep serrations; corolla lobes much exceeding the tube, 

 lanceolate, acuminate, lacerated; scales exserted, somewhat spatulate, 

 fringed, bridged at about a quarter of their height; stamens shorter than 

 the lobes; anthers ovate-oblong, rather shorter than the slightly tapering 

 filaments, somewhat versatile; ovary globose, slightly thickened at the 

 apex; styles slender, much longer than the ovary. Capsule globose, with 

 a slightly thickened collar about the intrastylar aperture; bearing the 

 withered corolla about its apex; seeds one to four in a capsule, oval, some- 

 what compressed; hilum small, transverse?. 



Type locality: Cuicatlan, Mexico. 



Specimens examined: Mexico: Cuicatlan (Smith 406, the type in the Gray Herbar- 

 ium). 



Cuscuta deltoidea n. sp. . 

 [Figures 15 and 122] 



Stems very slender. Flowers glabrous, pentamerous, short (mostly 

 less than 2 mm. long), on pedicels much longer than the flowers in congested, 

 cymose-paniculate clusters; calyx shallow; lobes short, broadly ovate, 

 obtuse, overlapping, somewhat verrucose; corolla campanulate; lobes 

 triangular-ovate, acute, becoming reflexed; scales shorter than the tube or 

 reaching the filaments, fringed with medium length processes, bridged at 

 about their middle; stamens slightly longer or about equalling the corolla 

 lobes; anthers oval, shorter than the filaments, slightly versatile; styles 

 longer than the globose ovary, becoming exserted; stigmas capitate. Cap- 

 sule depressed-globose, with a thickened collar about the intrastylar 

 aperture, circumscissile; mature seeds not seen. 



This species differs from C. gracillima, which it resembles somewhat, 

 in the more triangular-ovate corolla lobes and the short, broadly obtuse 

 overlapping calyx segments. It differs from C. pentagona in its shorter 

 scales, longer stamens, circumscissile capsule and type of inflorescence. 



Type locality: Manzanillo, Jalisco, Mexico. 



Specimens examined: Mexico: Jalisco; Manzanillo (Palmer 948, the type, in the 

 U. S. Nat. Herb, as sheet 208,677). 



