135] NORTH AMERICAN AND WEST INDIAN CUSCUTA—YUNCKER 45 



Cuscuta tuber culata Brandegee 

 [Figures 20 and 78] 



C. tuberculoid Brandegee, Univ. Calif. Bot. Publ., 3:389, 1909. 



Stems slender. Flowers 2.5-4 mm. long, pentamerous, on pedicels 

 longer or shorter than the flowers, in umbellate-racemose clusters; calyx 

 about half as long as the cylindrical corolla tube; lobes triangular, acute, 

 keeled, giving the calyx somewhat of a squarish appearance; corolla lobes 

 equal to or shorter than the tube, upright, triangular-acute; the basal 

 portion of the corolla papillate, especially that part enclosed by the calyx; 

 scales about reaching the middle of the tube, ovate, fringed with short 

 processes, bridged at about the middle; stamens shorter than the lobes 

 or slightly longer in some specimens; anthers oblong, linear, shorter than or 

 equalling the filaments; ovary small, globose, pointed, with a thickened 

 ring about the intrastylar aperature; styles much longer than the ovary, 

 exserted. Capsule globose, umbonate, circumscissile, with the withered 

 corolla' capping the capsule; mature seeds not seen. 



Type locality: Santa Margarita island, Lower California, Mexico. 

 Range: Lower California to New Mexico. 



Specimens examined: Mexico: Lower California (Brandegee in 1915), Santa Mar- 

 garita Island (Brandegee, the type, in the Univ. California Herb, as sheet 124,474), San 

 Jose (Brandegee 404, Grabendorfer in 1899), Pescadero (Brandegee in 1893), west coast 

 of cape region (Brandegee in 1893). Sonora; Northwestern Mts. (Pringle in 1884), 

 Bavispe (Hartman 179). 



United States: New Mexico; Gila Valley (Green, 3 collections in 1880). 



Cuscuta leptantha Engelmann 

 C. leptantha Engelmann, Trans. Acad. Sci. St. Louis, 1:489, 1859. 



Stems very slender. Flowers 3-4.5 mm. long, tetramerous or pentam- 

 erous, on pedicels as long as or longer than the flowers, in umbellate 

 clusters; calyx short, campanulate, lobes triangular-ovate, acutish, some- 

 what fleshy, papillose, about reaching the middle of the corolla tube; 

 corolla cylindrical, fleshy and papillose in the basal portion; lobes nearly 

 as long as the tube, upright to reflexed, slightly fleshy, triangular, lanceo- 

 late, acute; scales oblong, truncated or somewhat deltoid, shorter than the 

 tube, fringed with short processes, bridged at about a quarter or a half of 

 their height; stamens somewhat shorter than the lobes; anthers oval, 

 shorter than the slender filaments; styles slender, much longer than the 

 ovoid ovary, exserted; stigmas capitate. Capsule globose, slightly um- 

 bonate, two to four seeded, circumscissile, capped with the withered 

 corolla; seeds about .8 mm. long, ovate, brown, oblique, compressed, 

 angled; hilum short, oblique or transverse. 



Cuscuta leptantha typica 

 [Figure 34 a-e] 

 Lobes of the corolla ordinarily four (infrequently five), upright; scales 



