123] NORTH AMERICAN AND WEST INDIAN CUSCUTA—YUNCKER 33 



in the calyx with usually only the short, ovate, obtuse, upright to slightly 

 spreading lobes exserted, but becoming exserted on the capsule; scales 

 triangular, or sometimes somewhat oblong, fringed, shorter than the tube 

 or sometimes reaching the base of the stamens, usually bridged about the 

 middle or above; stamens subsessile, on filaments shorter than the anthers, 

 included ; anthers oval and in some specimens with the connective produced 

 into a slight apiculation; styles longer than the globose ovary, becoming 

 exserted, slender; stigmas capitate. Capsule globose-ovoid, circumscissile, 

 capped by the withered corolla; seeds about 1.5 mm. long, light brown, 

 usually but one or two in a capsule, ovoid, slightly compressed, with an 

 indentation running lengthwise; hilum small, oval, oblique or reduced to 

 a rounded spot. 



It is rather questionable what species of Cuscuta Linnaeus referred to 

 as C. americana. It has been thought best to retain the name for this 

 species, as indicated by Engelmann. For a discussion of the confusion 

 regarding the name see Coulter (1904). 



There appear to be two forms of this species based more or less on 

 difference in size. One, variety congesta, is common in Mexico and the 

 West Indies, while the other, variety spectahilis, is rather closely confined to 

 the West Indies. 



Cuscuta americana congesta Progel 

 [Figures 22, 109 and 138] 



C. americana congesta Progel in Martius, Fl. Brasiliensis, 7:376, 1871. 



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



1:482, 1859; in synon. 

 C. leiolepis Miquel, Linnaea, 18:247, 1844. — Engelmann, Trans. Acad. Sci. St. Louis, 1:482, 



1859; in sjmon. 

 C. surinamensis Schilling, Comm. Lepra., p. 200, t. 2, 1778. — Engelmann, Trans. Acad. Sci. 



St. Louis, 1:482, 1859; in synon. 

 C. campannlata Nuttall in Engelmann, Trans. Acad. Sci. St. Louis, 1:482, 1859; in synon. 



Flowers about 2-3 mm." long, closely compacted in many flowered 

 clusters, usually dark brown in herbarium specimens; stamens frequently 

 with an apiculation of the connective; capsule ovoid, usually one-seeded; 

 scales ordinarily bridged above the center. 



Type locality: Acapulco, Guerrero, Mexico. Range: Throughout 

 the West Indies and in Mexico. 



Specimens examined : Fragments of the types of C. campantdata and C. leiolepis in the 

 Engelmann Herb. West Indies: Bahamas; Cat Island (Britton & MiUspaugh 5925, 5963), 

 Grand Turk Island (Millspaugh & MiUspaugh 9029), Governor's Harbor (Hitchcock in 1890, 

 Britton & Millsphaugh 5519), Berry Islands (Britton & Millspaugh 2208), Exuma Chain 

 (Britton & Millspaugh 2811). Cuba; El Cobre (Britton, Cowell & Shafer 12887), Rio San 

 Juan (Britton, Earle & Wilson 5917), Guantanamo Bay (Britton 1910), Santa Clara Prov. 

 (Combs 546). Jsla of Pines (Britton, Wilson & Selby 14493, Britton, Wilson & Leon 15321). 

 Santo Domingo (Rose, Fitch & Russell 3691). Haiti (Nash & Taylor 1578), Les Cayes 

 (Favrat 41). Jamaica (Britton 3897), Hope Road (Harris 6975), Kingston (Britton 3006, 



