34 ILLINOIS BIOLOGICAL MONOGRAPHS [124 



Hitchcock in 1890). St. Thomas (Britton, Britton & Shafer 43). Barbados (Dash 628). 

 Guadeloupe (Pere Duss 2468). Martinique (Pere Duss 1878, Sieber 91). Grenada (Broadway 

 in 1905). Curasao (Britton & Shafer 3065). 



Mexico: Sonora (Hartman 236), Guaymas (Brandegee in 1893, Palmer 331). Guerrero 

 (Langlasse 127), Acapulco (Bentham, the type of C. congesta, a fragment in the Engelmann 

 Herb, taken as the type, Palmer 341). Sinaloa; Mazatlan (Gregg in 1849, Rose, Standley & 

 Russell 13727, Brandegee in 1893). Yucatan (Linden). 



Cuscuta americana spectabilis Progel 



C. americana spectabilis Progel in Martius, Fl. Brasiliensis, 7 :377, 1871 . 



C. spectabilis Choisy, Mem. Soc. Phys. et Hist. Nat. Geneve, 9:283, pi. 5, fig. 1, 1841; and in 



DC., Prodromus, 9:459, 1845. — Engelmann, Trans. Acad. Sci. St. Louis, 1:483, 1859; in 



synon. 

 C. globulosa Bentham, Bot. Sulph., p. 138, 1845. — Engelmann, Trans. Acad. Sci. St. Louis, 



1:483. 1859: in synon. 



Flowers 3-4 mm. long, less densely compacted in fewer flowered 

 clusters; flowers ordinarily of a lighter color and rather more membranous; 

 stamens ordinarily not apiculate; scales somewhat more deeply bridged 

 and fringed; capsule slightly depressed and ordinarily two-seeded with the 

 seeds larger. 



Type locality: "Hab. circa Bahiam." Type not seen. Range: In 

 the West Indies throughout the Greater Antilles and the Leeward Islands 

 and sparingly in Mexico. 



Specimens examined: West Indies: Bahamas; Anguilla Islands (Wilson 7983). 

 Cuba (Linden 1994, Wright 1659 in part & in 1865, Bro. Hioram 2279, Pollard & Palmer 393), 

 Santiago (Hamilton 16). Porto Rico (Sintenis 3239, Britton, Britton & Marble 2227, Heller 

 1899, 6169, Goll 565, 711, Underwood & Griggs 636, Britton & Wheeler 224, Britton, Cowell 

 & Britton 5379). Virgin Gorda (Britton & Fishlock 1101). St. Thomas (Kuntze 555, 556, 

 Holton, Britton, Britton & Shafer 137). Torlola (Britton & Shafer 707, Fishlock 489) 

 Santo Domingo (Poiteau in 1802, in 1845, Wright, Parry & Brummell 391, Fuertes 194). 

 Haiti (Nash 759), Azua (Rose, Fitch & Russell 3853), Santo Domingo City (Rose, Fitch & 

 Russell 3763). St. Croix (Ricksecker 93, 313, 313a, Rose, Fitch & Russell 3604, 3608). Mont- 

 serral (Shafer 31). Antigua (Rose, Fitch & Russell 3279). 



Mexico: Guerrero; Acapulco (Bentham, the type of C. globulosa, a fragment in the 

 Engelmann Herb.). Yucatan (Gaumer 705, a more elongated form). 



Cuscuta corymbosa Ruiz & Pavon 



C. corymbosa Ruiz & Pavon, Fl. Peruv., 1:69, pi. 105, fig. b, 1798.— Choisy, Mem. Soc. Phys. 



et Hist. Nat. Geneve, 9:276, 1841; and in DC, Prodromus, 9:456, 1845.— Engelmann, 



Trans. Acad. Sci. St. Louis, 1 :483, 1859. 

 Kadula corymbosa Rafinesque, Fl. Tellur., 4:90, 1836. 



Stems medium. Flowers glabrous, 4-7 mm. long, pentamerous, sub- 

 sessile on pedicels much shorter than the flowers, forming a more or less 

 corymbose-paniculate inflorescence; calyx membranous, loose about the 

 corolla, angled, lobes short, broad, obtuse, slightly overlapping, scarcely 

 reaching, or exceeding the middle of the corolla tube; corolla more or less 

 globular and furrowed along the stamen attachments in the lower part, 

 or cylindrical and scarcely furrowed; lobes about a fourth as long as the 



