Dec, 1922] YUNCKER — SOUTH AMERICAN SPECIES OF CUSCUTA 
569 
The number of bracts present in the flowers of this species varies con- 
siderably with the different flowers. It is possible that with more abundant 
material some flowers might be found lacking them entirely. This species 
appears to represent a transition stage between those species not having 
bracts and those possessing them. It differs from C. hracteata in the shapes 
of the stigmas and of the floral parts. 
Type locality: Pro v. Goyaz, Brazil. Distribution: Known only from 
the type locality. 
Specimens examined: Brazil: Prov. Goyaz (Glaziou 21810, the type, in the herbarium 
of the Botanical Institute at Dahlem, a fragment in the author's herbarium). 
14. Cuscuta hracteata Engelmann 
(PI. Ill, fig. 16, A-E) 
Cuscuta hracteata Engelmann, Trans. Acad. Sci. St. Louis i: 509. 1859. 
Stems medium or coarse. Flowers reddish, 5-6 mm. long, sessile or 
subsessile, in loose spicate or paniculate clusters, subtended by two to five 
ovate, obtusish or acute, sometimes cuspidate, bracts; flower parts serrulate 
and with numerous pellucid, glandular-appearing cells; sepals distinct, 
ovate, acute, sometimes cuspidate, as long as the corolla tube; corolla 
subcylindrical, lobes upright or spreading, ovate-lanceolate, acute, not quite 
as long as the tube; stamens shorter than the corolla lobes, filaments 
nearly equal to the oval to oblong anthers; scales reaching the stamens, 
abundantly fringed with long processes, bridged at about the middle; 
styles not subulate, longer than the globose ovary; stigmas oval-elongated. 
Capsule globose-ovoid, circumscissile, membranaceous, carrying the with- 
ered corolla at the apex; seeds 2-2.5 rn"^- long, 2-4 in each capsule, ovoid, 
hilum short, longitudinal. 
This species has a definitely circumscissile capsule, although Engelmann, 
because of the undeveloped condition of the type specimen, did not so 
consider it. 
Type locality: Prov. Goyaz, Brazil. Distribution: Known only from 
the type locality. 
Specimens examined: Brazil: Prov. Goyaz (Gardner 3348, the type, in the Royal 
Botanic Gardens, Kew. A fragment in the Engelmann herbarium). 
15. Cuscuta serrata n. sp. 
(PI. Ill, fig. 17, A-E) 
Stems slender or medium, disappearing early from between the floral 
masses. Flowers about 5 mm. long, yellowish or reddish, sessile, in dense, 
compact, globular or elongated, closely adherent clusters, surrounded by 
many (5-15) ovate-lanceolate, acute or acuminate bracts, all parts of the 
flowers serrate and having many pellucid, glandular-appearing cells; sepals 
distinct, ovate-lanceolate, acute or acuminate, sometimes cuspidate, as 
long as the corolla tube, more or less squarrose, bract and sepal tips some- 
times recurving; corolla cylindrical; lobes ovate, acute to acuminate, some- 
times cuspidate, overlapping, shorter than the tube, upright or spreading; 
stamens shorter than the lobes; filaments shorter than or equaling the oval- 
oblong anthers; scales mostly not reaching the stamens, bridged at or 
