117] NORTH AMERICAN AND WEST INDIAN CUSCUTAYUNCKER 27 



Stems coarse. Flowers glabrous, 4-6 mm. long, pentamerous, on 

 short pedicels in compact globular clusters; calyx lobes about as long as 

 the corolla tube, ovate, obtuse, unequal, overlapping, the larger lobes 

 usually strongly and unevenly carinate, the others less so; corolla campanu- 

 late; lobes ovate, obtuse, about as long as the tube, spreading to reflexed; 

 scales oblong, sometimes somewhat truncated, as long as the tube, deeply 

 fringed; stamens shorter than the lobes; filaments subulate, equal to the 

 oblong anthers; ovary conical; styles shorter than the ovary, subulate, 

 continuing the outlines of the ovary; stigmas capitate, sometimes slightly 

 convoluted. Capsule 5-8 mm. long, circumscissile, with the withered 

 corolla about it; styles widely divergent like horns; seeds oval, about 2 mm. 

 long, angled; hilum short, oblong, transverse. 



Type locality: "Enroute San Luis Potosi to Tampico, Mexico." 



Range: Central and southern Mexico. 



Specimens examined: Mexico: Between San Luis Potosi and Tampico (Palmer Dec. 

 1878 to Feb. 1879, the t^-pe, in the Engelmann Herb.). Vera Cruz; Jalapa (Rose & Hay 6170), 

 Orizaba (Smith 204). San Luis Potosi; Alvarez (Palmer 137). Michoacan (Pringle 4330). 



Cuscuta jalapensis Schlechtendal 

 [Figures 26, 65 and 66] 

 C. jalapensis Schlechtendal, Linnaea, 8:515, 1833. Engelmann, Trans. Acad. Sci. St. Louis, 

 1:478, 1859. 



Stems medium. Flowers 3-3.5 mm. long, glabrous, pentamerous, 

 in dense clusters, on pedicels as long as or shorter than the flowers; calyx 

 shorter than the campanulate corolla, lobes overlapping, ovate, obtuse, 

 somewhat thickened and verrucose along the middle; corolla lobes ovate, 

 obtuse, shorter than the tube, upright to reflexed; scales about as long as 

 the tube, fringed; stamens shorter than the lobes; anthers ovate, about 

 equalling the slightly subulate filaments; ovary globose-conic, styles 

 shorter than the ovary, strongly subulate. Capsule circumscissile, 

 globose, surrounded by the withered corolla, the conical styles widely 

 divergent; seeds about 1.5 mm. long, ovate; hilum narrow, transverse. 



This species is closely allied with C. mitraeformis but seems to differ 

 from it in the smaller flowers, more globose ovary and less conical styles. 



Type locality: "Prope Jalapam Mexico." Range: Mexico. 



Specimens examined: Mexico: (Miiller in 1853), Jalapa (Schiede 152, the type number, 

 in the Engelmann Herb.), Mexico City (Bustamente 83), near Mexico (Graham 250). San 

 Luis Potosi; San Luis Potosi (Palmer 631). Chihuahua; Chihuahua (Townsend & Barber 294, 

 Pringle 291), Sierra Madre (Pringle 1342). 



Cuscuta rugo sleeps n. sp. 

 [Figures 1, 70 and 155] 

 Stems coarse. Flowers glabrous, 4-6 mm. long, sessile, in compact 

 clusters; calyx large, campanulate, nearly as long as the corolla tube; 

 lobes short, broad, unequal, obtuse, somewhat lobed at the sinuses, over- 

 lapping, frequently carinate; corolla campanulate; lobes ovate, obtuse, 



