Dec, 1922] YUNCKER SOUTH AMERICAN SPECIES OF CUSCUTA 
subulate, shorter than or nearly equaling the globose ovary which is thick- 
ened in the form of a ring about the wide, gaping, intrastylar aperture. 
Capsule globose, exserted, irregularly circumscissile in a zone of very thin 
tissue toward the base, the withered corolla towards its base; seeds one to 
four in each capsule, 1.5-2 mm. long, ovate, hilum perpendicular. 
Engelmann did not consider the capsule of this species as being circum- 
scissile. However, fully matured capsules break away easily in an irregular, 
but definite, line of cleavage. The thickened top and wide intrastylar 
aperture distinguish this species. 
Type locality: Prov. Goyaz, Brazil. Distribution: Prov. Goyaz, Brazil, 
Venezuela and Colombia. 
Specimens examined: Colombia: Villavicencio (Pennell ; Prov, Bogota (Triana 
in 1851-57). 
Venezuela: Rio Meta (Karsten, taken to represent a co-type, a fragment in the 
Engelmann herbarium). 
17. Cuscuta incurvata Progel 
(PI. II, fig. 7. A-^E) 
Cuscuta incurvata Progel in Martins, Flora Brasiliensis 7: 379, PI. 126, fig. 4. 1871. 
Cuscuta incurvata apaensis Chodat & Hassler, Bull. Herb. Boissier II, 7: 280. 1907. 
Stems medium to slender. Flowers about 2 mm. long, subsessile or 
short-pedicellate, in dense cymose or umbellate clusters; calyx mostly 
shorter than the corolla tube; lobes ovate, obtuse, scarcely imbricate; 
corolla widely campanulate ; lobes nearly as long as the corolla tube, reflexed 
or upright, ovate, obtuse or slightly acutish ; stamens shorter than the corolla 
lobes; oval anthers shorter than or about equahng the stout, subulate 
filaments; scales reaching the stamens, fringed with short processes, bridged 
below the middle; stout and scarcely, if at all, subulate styles as long as, 
or longer than, the globose ovary. Capsule depressed-globose, membra- 
naceous about the base, becoming late and irregularly circumscissile, 
carrying the withered corolla about it; seeds ovate-oblong, four in each 
capsule, about 1.5 mm. long, hilum oblique-perpendicular. 
This species differs from C. trichostyla, to which it bears some resem- 
blance, in the fact that the calyx lobes do not broadly overlap and by the 
possession of longer scales. 
Type locality: Prope Lagoa Santa." Distribution: The only specimens 
seen by the writer were from Paraguay. 
Specimens examined: Paraguay (Fiebrig in 1909; Anisits 2jgj, 2555, 2854); between 
the rivers Apa and Aquidaban (Fiebrig 4254, 5083); upper course of the river Apa (Hassler 
8iy8, the type number of variety apaensis). 
18. Cuscuta trichostyla Engelmann 
Cuscuta trichostyla Engelmann, Trans. Acad. Sci. St. Louis i: 495. 1859. — Progel in 
Martins, Flora Brasiliensis 7: 383, PL 127, fig. 6. 1871. 
Stems slender. Flowers 2.5-4 long, subsessile in compact globular 
clusters; calyx not as long as, or about equaling, the corolla tube; lobes 
ovate-orbicular, obtuse, broadly imbricated, somewhat carinate towards 
the apex; corolla campanulate or slightly cylindrical, lobes shorter than the 
