139] NORTH AMERICAN AND WEST INDIAN CUSCUTA—YUNCKER 49 



Specimens examined: United States: Texas; San Marcos (Nealley 92), Dallas 

 (Reverchon in 1878), Rio San Pedro (Bigelow in 1850, Schott in 1851), western Texas to 

 El Paso (Wright in 1849). California; San Bernardino Co. (Parish), San Bernardino (Parish 

 in 1898). Indian Territory; Sapulpa (Bush 1405). Louisiana (Tainturier; Langlois 237). 

 Georgia (Boykin in 1838, taken as the type, in the Engelmann Herb.). Florida (Rugel 400), 

 Jamony (Rugel in 1843), St. George's Island (herb. Chapman in 1863). 



West Indies: Porto Rico; Sierra de Naguabo (Britton, Britton & Cowell 2109). Cuba 

 (Wright in 1865, van Hermann 686); Habana (Wilson 1111, 1129). 



Mexico: Durango; Durango (Palmer 605). 



Cuscuta polygonorum Engelmann 

 [Figures 39, 107 and 150] 



C. polygonorum Engelmann, Amer. Journ. Sci. & Arts, 43:342, pi. 6, figs. 26-29, 1842. — 

 Choisy in DC, Prodromus, 9:461, 1845; not Cesati, 1849. 



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

 St. Louis, 1:494, 1859.— Britton & Brown, Illustr. Flora, 3:28, fig. 2959, 1898; and 2 ed., 

 3:49, fig. 3445, 1913— Matthew, Bull. Torr. Bot. Club, 20, pi. 165, fig. 7, 1893. 



Stems medium to slender. Flowers glabrous, about 2-2.5 mm. long, 

 mostly tetramerous (infrequently tri- or pentamerous), subsessile, in 

 compact, dense, glomerulate clusters; calyx lobes triangular, obtuse, as 

 long as or longer than the corolla tube, corolla short campanulate, lobes 

 triangular-acute, upright, as long as or slightly longer than the corolla 

 tube; scales oblong, about reaching the filaments or shorter, bifid, their 

 processes few and short, about the upper portion, bridged at about a 

 quarter of their height; stamens shorter than the lobes; anthers oval, pollen 

 sacs sometimes separated by the connective, shorter than the subulate 

 filaments which are situated more or less directly in the sinuses; styles 

 shorter than the globose, depressed ovary, becoming subulate and divergent. 

 Capsule globose, depressed, appearing cubical about the developing seeds; 

 intrastylar aperture large, rhombic; seeds about 1.3 mm. long, yellowish 

 brown, roundish, slightly rostrate and compressed; hilum oblong, linear, 

 transverse to oblique. 



Type locality: "West of St. Louis." Range: From Maryland and 



the District of Columbia west to Minnesota and Nebraska and south to 



Tennessee and possibly to Texas. 



Specimens examined: United States: Maryland; Little Falls of Potomac (Mohr in 

 1882), Glen Echo (Hillman), Chesapeake Bay region (Shull 393). Delaware (Tatnall). 

 District of Columbia; Washington (Chase 2532, Steele in 1900). Pennsylvania; Lancaster 

 Co. (Porter in 1863). Ohio; Ottawa Co. (Moseley in 1898), Florence (Moseley in 1897), 

 Kentucky; Bowling Green (Price in 1898), Harlan Co. (Lloyd in 1888). Crawford Co. 

 (Sears in 1916). Tennessee; Nashville (Gattinger in 1881). Indiana; Whiting (Hill in 1891), 

 Hanover (Coulter in 1876), Grant Co. (Deam 15269), Franklin Co. (Deam in 1903), Vigo Co. 

 (Deam 22182). Illinois; Elgin (Umbach in 1895), Mt. Carmel (Schneck in 1905, in 1897, 

 on Pataka Island near Mt. Carmel in 1879 and one collection without date), Peru (Engelmann 

 in 1840, taken to represent the type, in the Engelmann Herb.), Wabash Co. (Schneck in 1880). 

 Urbana (Clinton 30438, Yuncker 1010, 1000a, b, c, & d), Taylorville (Andrews in 1892 and 

 in 1898), Peoria (Brendel in 1892), St. Clair Co. (Eggert in 1878). Wisconsin; Green Bay 

 marsh east of Fox River (Schuette 95-11-7), Beaver Dam (Chandler 485), Madison (Cheney 



