143] NORTH AMERICAN AND WEST INDIAN CUSCUTAYUNCKER 53 



Cuscuta plattensis Nelson 

 [Figure 35] 

 C. plattensis Nelson, Bull. Torr. Bot. Club, 26:131, 1899. 



Stems medium to slender. Flowers glabrous, 2.5-5 mm. long, pentam- 

 erous, on pedicels about equal to the flowers in panicled cymes; calyx 

 shorter than the corolla tube; lobes triangular, obtuse, slightly overlapping; 

 corolla tube broadly campanulate; lobes about equalling the tube, tri- 

 angular, acute, (not "short-ovate, obtuse, about half the length of the 

 broadly campanulate tube"), slightly irregular in some, spreading or 

 reflexed, with the tips inflexed; scales shorter than the tube, slightly 

 spatulate, copiously fringed with short processes; stamens shorter than 

 the lobes; anthers oval, about equal to the subulate filaments; ovary 

 depressed-globose, verrucose and thickened about the intrastylar aperture; 

 styles slightly unequal, about equal to the ovary or shorter. Capsule 

 depressed-globose; seeds one to four in a capsule, about 1-1.5 mm. long, 

 oval or obovate, robust; hilum short, linear, transverse. 



This species is very closely related to C. pentagona and perhaps merges 

 with some of the larger forms of variety calycina. It seems to differ in 

 the shorter scales and shorter processes and the rather larger flowers. 



Type locality: "In canon of Platte," Wyoming. Range: Wyoming 

 and Washington. 



Specimens examined: United States: Wyoming; Platte Canyon (Nelson 2768, the 

 type, in the Rocky Mt. Herb., Univ. of Wyoming), Uva (Nelson 2741, mixed with C. indecora 

 on some sheets), Converse Co. (Nelson 9118). W ashington ;'K\\ck\X.di\. Co. (Suksdorf 2852.) 



Cuscuta cephalanthi Engelmann 

 [Figures 53, 57, 58 and 142] 



C .cephalanthi Engelmann, Amer. Journ. Sci. & Arts, 43:336, pi. 6, fig. 1-6, 1842. Matthew, 

 Bull. Torr. Bot. Club, 20, pi. 164, fig. 6, 1893. Britton & Brown, Illustr. Flora, 3:29, 

 fig. 2962, 1898; 2 ed., 3:50, fig. 3448, 1913. 



C. tenuiflora Engelmann in Gray, Manual of Botany, p. 350, 1848; and in Trans. Acad. Sci. 

 St. Louis, 1:497, 1859. 



Epithymum cephalanthi (Engelmann) Nieuwland & Lunell, Amer. Mid. Nat., 4:511, 1916 r 



Stems medium. Flowers glabrous, about 2 mm. long, commonly 

 tetramerous, less frequently tri- or pentamerous, sometimes more or less 

 glandular; calyx shorter than the corolla tube, deeply divided; lobes 

 oblong-ovate, obtuse; corolla cylindric-campanulate, becoming somewhat 

 urceolate as the capsule matures; lobes ovate, obtuse, erect to spreading, 

 much shorter than the tube; scales oblong, narrow, fringed with scattered 

 processes, reaching the filaments, bridged at from a quarter to a third of 

 their height; stamens mostly equal to or slightly shorter than the lobes; 

 anthers oval to round, about equal to the stoutish filaments; styles equal 

 to or slightly longer than the globose somewhat depressed ovary. Capsule 

 depressed-globose, capped by the persistent, withered corolla; seeds about 



