163] NORTH AMERICAN AND WEST INDIAN CUSCUTA—YUNCKER 73 



bridged at about the middle; styles slender and much longer than the 

 globose-oblong or slightly conic ovary; stamens shorter than the lobes; 

 anthers oval, somewhat cordate, slightly versatile, usually shorter than 

 the filaments. Capsule globose, with a slightly thickened ridge or collar 

 about the intrastylar aperture, frequently with numerous glandular cells, 

 carrying the withered corolla at the apex; seeds about 1.4 mm. long, olive 

 brown, slightly obovate, compressed or angular; hilum short, oblong or 

 oval, oblique or nearly transverse. 



When Engelmann described this species he segregated two varieties 

 (variety pratensis and variety humida), a distinction that he did not 

 maintain, however, in his later publications. It has been impossible to 

 differentiate varieties although the forms included here show considerable 

 variation in the number of bracts, texture of the flowers, etc. 



Type locality: "Dry prairies west of the Brazos." Range: Mostly 

 in the prairie states; from Illinois westward to Utah and Colorado and 

 southward to Texas and Louisiana. 



Specimens examined: United States: Lat. 41° (Hall & Harbour 404). Connecticut; 

 New Haven (Eaton, ex. Herb. Thurber in Herb. G. V. Nash. Seems typ\ca\, but probably 

 not collected in Conn.). Illinois; St. Clair Co. (Eggert in 1878, in 1891), Mascoutah (Welsch), 

 Cahokia (Eggert in 1874). A'. Dakota; Towner (Lunell 842), McHenry Co. (Lunell in 1908). 

 S. Dakota; Brookings Co. (Johnson in 1903). Nebraska; Valentine (Bates in 1895), Grant 

 Co. (Rydberg 1639), Lincoln (Hannah in 1916), Nichols Co. (Hedgcock in 1889), Sand 

 Hills of the Platte (Hayden in 1853-54). Iowa; Muscatine (Reppert in 1895). Kansas; 

 Finney Co. (Hitchcock 359), Manhattan (Carleton in 1892), Tankton (without indication of 

 collector, in 1892), Meade (Smyth 80a, c, e, f, g, i, k), Rockport (Bartholomew in 1889), 

 Miami Co. (Oyster 5953), Bourbon Co. (Hall in 1867). Missouri; St. Louis (Eggert in 1891), 

 Willard (Standley 9700, Blankinship in 1889 and in 1892), Maiden (Bush in 1893), Kansas 

 City (Bush 414), Campbell (Bush in 1893), Pacific (Thompson in 1898), Iron Cd. (Russell in 

 1897). Oklahoma (DeBarr 460), Pottawatomie Co. (White in 1900). Indian Territory 

 (Butler in 1875), Sapulpa (Bush 388, 1359). Louisiana; Lake Charles (Mackenzie 543). 

 New Mexico; Arkansas River (Fendler 659b). Texas (Lindheimer 277), Victoria (Thurber 

 2), Dallas (Reverchon 664, 2194), Fort Smith to the Rio Grande (Bigelow 3, and in 

 1853-54), Polytechnic (Ruth 317), Randall Co. (Ball 1261), Moore Co. (Carleton 421), 

 Austin Co. (Wurzlaw), Fort Worth (Reverchon 3202), Columbia (Bush 932), Brazoria Co. 

 (Palmer 6684), on the Blanco (Wright in 1847), west of the Brazos (Lindheimer 125, taken 

 as the type, in the Engelmann Herb.), between San Antonio & Victoria (Schott), Wilburger 

 Co. (Eggert). Colorado (Parry 273). Utah; Ogden Hot Springs (Ries in 1893), North 

 Ogden (Hillman). 



Cuscuta squdmata Engelmann 

 [Figures 51, 117 and 135] 

 C. squamata Engelmann, Trans. Acad. Sci. St. Louis, 1:510, 1859. 



Stems slender. Flowers glabrous, pentaraerous, sessile, few to several 

 in separate or glomerate clusters, subtended by 2-10 ovate, acute, ser- 

 rulated, sometimes cuspidate, closely appressed bracts that are shorter 

 than the calyx; calyx lobes distinct, ovate, acute, cuspidate, closely 

 appressed, somewhat serrulate, equalling the corolla tube, in appearance 



