AMERICAN 
JOURNAL OF BOTANY 
Vol. X January, 1923 No. 1 
REVISION OF THE SOUTH AMERICAN 
SPECIES OF CUSCUTA 
II 
T. G. Yuncicer 
(Received for publication March 25, 1922) 
Section Clistogrammica Engelmann 
Key to the Subsections 
Flowers not subtended by bracts; calyx segments more or less united. Platycarpae. 
Flowers subtended by numerous bracts; calyx segments mostly free (no 
members of this subsection have been found from South America). Lepidanche. 
Subsection Platycarpae Engelmann 
Key to the Species 
Calyx lobes obtuse (acutish in C. gymnocarpa, C. suaveolens, and C. 
parviflora ). 
Calyx lobes mostly not overlapping, or but slightly so, mostly 
smooth. 
Styles becoming subulate and divaricate in fruit.25. C. obtusiflora. 
Styles not becoming noticeably subulate in fruit (subulate in C. 
pentagona subulata ). 
Flowers mostly more than 2 mm. long. 
Scales prominent, withered corolla about the capsule or at 
its base. 
Corolla lobes acute. 
Calyx nearly as long as the corolla, lobes ovate, 
may be slightly overlapping, corolla lobes 
upright or reflexed. 
Corolla lobes spreading or reflexed, tips inflexed. 
26. C. pentagona. 
Corolla lobes upright.27. C. gymnocarpa. 
Calyx much shorter than the corolla, lobes triangu¬ 
lar, not at all overlapping, corolla lobes upright, 
tips inflexed.28. C. suaveolens. 
Corolla lobes mostly obtuse. 
Calyx lobes not overlapping.29. C. racemosa. 
Calyx lobes more or less overlapping.30. C. platyloba. 
[The Journal for December (9: 535-581) was issued Jan. 10, 1923.] 
I 
