Dec, 1922 1 YUNCKER SOUTH AMERICAN SPECIES OF CUSCUTA 
567 
II. Cuscuta acutiloha Engelmann 
(PI. I, fig. 5. A-E) 
Cuscuta acutiloha Engelmann, Trans. Acad. Sci. St. Louis i: 478. 1859. 
Stems medium to slender. Flowers 2.5-3 t^^- long, on pedicels shorter 
than or exceeding the length of the flowers, in cymose clusters; calyx as 
long as the corolla tube; lobes overlapping and somewhat angled at the 
sinuses, triangular-ovate, acuminate or sometimes cuspidate; corolla 
purplish-red, campanulate, becoming urceolate and globular about the 
ripening capsule; lobes lanceolate, acute, reflexed, overlapping at the base, 
mostly longer than the tube; stamens much shorter than the lobes, orbicular 
anthers about equal to the filaments; scales oblong, narrow, reaching the 
stamens, sparingly fringed with short processes, bridged much below the 
middle; styles subulate, shorter than, and tapering into, the globose ovary. 
Capsule depressed-globose, membranous, early circumscissile, with the 
withered corolla about it; seeds 1-1.5 mm. long, roundish or ovate, ordi- 
narily four in each capsule, hilum short. 
This species is easily distinguished by the purplish-red color of the 
corolla, which is in marked contrast with the straw color of most of the 
other South American species. 
Type locality: "At the bridge of Obragilla, Peru." Distribution: Bolivia 
and Peru. 
Specimens examined: Bolivia: Sorata (Mandon j^^/). 
Peru: Bridge of Obragilla (Mathews in 1857, the type, in the Royal Botanic Gardens, 
Kew). 
12. Cuscuta xanthochortus Engelmann 
Cuscuta xanthochortus Engelmann, Trans. Acad. Sci. St. Louis i: 486. 1859. — Progel in 
Martins, Flora Brasiliensis 7: 379, PI. 126, fig. 5. 1871. 
Cuscuta corniculata racemulosa Engelmann, Trans. Acad. Sci. St. Louis i: 504. 1859. — 
Progel in Martius, Flora Brasiliensis 7: 382, PI. 127, fig. 3. 1871. 
Stems slender. Flowers 2-3 mm. long, subsessile, or on pedicels shorter 
than the flowers, in racemose or cymose clusters; calyx shorter than or 
exceeding the length of the corolla; lobes triangular-ovate or somewhat 
lanceolate, acute, overlapping at the base, thickened at the point, sometimes 
spreading or even recurving; corolla shallowly campanulate; lobes longer 
than the tube, reflexed, triangular-ovate or lanceolate, acute, tips commonly 
inflexed, smooth, or somewhat papillate and fleshy; stamens shorter than 
the lobes, the oblong-oval anthers shorter than or equaling the subulate 
filaments; scales reaching the stamens or infrequently shorter, bridged at 
about the middle, fringed with short processes; thick and slightly subulate 
styles longer than or about equaling the globose ovary which is thickened at 
the top in the form of a collar about the style bases. Capsule globose, cir- 
cumscissile, carrying the withered corolla about it. Mature seeds not seen. 
Cuscuta xanthochortus typica 
(PI. Ill, fig. 18, A-E) 
Flowers about 2 mm. long, on short pedicels in dense clusters; calyx 
lobes triangular, acutish, scarcely as long as the corolla tube. 
Engelmann did not consider this as having a circumscissile capsule, but 
it is evidently so closely related to the following variety which has a defi- 
