115] NORTH AMERICAN AND WEST INDIAN CUSCUTA—YUNCKER 25 



Co. (Commons 5850). New York; Buffalo (Clinton), Albany (Beck), Kelloggsville (Kil- 

 borae in 1882), Greenwich (Schrenk in 1890). Ohio; New London (Dewey in 1902. Michigan; 

 East Lansing (Wheeler in 1899). Pennsylvania; Lancaster Co. (Porter in 1863). 

 Canada: (Pringle in 1880). 



Sub-genus grammica (Loureiro) Engelmann 



Cuscuta group Grammica (Loureiro) Engelmann, Trans. Acad. Sci. St. Louis, 1 :459, 1859 



Grammica Loureiro, Fl. Cochinch., 1:170, 1790 



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



Anthanema Rafinesque, Fl. Tellur., 4:90, 1836 



Pentake Rafinesque, Fl. Tellur., 4:90, 1836 



Nemepis Rafinesque, Fl. Tellur., 4:91, 1836 



?Dastylepis Rafinesque, Fl. Tellur., 4:125, 1836 



?Eronema Rafinesque, Fl. Tellur., 4:125, 1836 



Lepidanche Engelmann, Amer. Journ. Sci. & Arts, 43:343, pi. 6, 1842 



Engelmannia Pfeiffer, Bot. Ztg., 3:673, 1845; not Torrey & Gray, 1841 nor Klotzsch, 1841 



Pfeifferia Buchinger, Ann. sci. nat., Ill, 5:88, 1846; not Salm-Dyck, 1845 



Cuscutina Pfeiffer, Bot. Ztg., 4:492, 1846 



Buchingera F. Schultz, Jahrb. f. Pharmacie, 1847; (cf. Bot. Ztg., 6:760, 1848) 



Cassutha Des Moulins, fitudes org. cusc, p. 77, 1853 



Flowers sessile or pedicellate; styles usually unequal, distinct; stigmas 

 capitate; capsule circumscissile or remaining closed. All of the species 

 found native in North America belong here. A small number parasitize 

 economically important plants. * 



Key to the sections 



Capsule circumscissile eugrammica (p. 25). 



Capsule remaining closed clistogrammica (p. 47). 



Section eugrammica Engelmann 

 Cuscuta section Eugrammica Engelmann, Trans. Acad. Sci. St. Louis, 1 :476, 1859. 



Capsule more or less regularly circumscissile. Flowers with or without 

 numerous subtending bracts; a few species with distinct prongs on the 

 dorsal surface of the corolla lobes; styles slender or tapering from broad 

 bases. Typically of the southwestern and southern United States and 

 of Mexico : a small number getting over into the West Indies. 



Key to the subsections 

 Styles subulate, divisions of the flowers obtuse. 



Flowers not subtended by numerous bracts subxjlatae (p. 25). 



Flowers subtended by numerous bracts lepidanchopsis (p. 29). 



Styles of about the same thickness throughout. 



Divisions of the perianth mostly obtuse obtxjsilobae (p. 30). 



Divisions of the perianth acute to acuminate leptilobae (p. 36) . 



Subsection subulatae Engelmann 

 Cuscuta § Subulatae Engelmann, Trans. Acad. Sci. St. Louis, 1 :476, 1859. 



Flowers large; the perianth divisions mostly obtuse; styles subulate, 

 stout, upright or mostly more or less divergent. T)^ically Mexican and 

 West Indian species. 



