2 
AMERICAN JOURNAL OF BOTANY 
[Vol. io, 
Scales narrow, not prominent, withered corolla capping 
the capsule.31. C. stenolepis. 
Flowers mostly less than 2 mm. long.32. C. parviflora. 
Calyx lobes broadly overlapping, frequently keeled.33. C. cristata. 
Calyx lobes acute. 
Flowers fleshy, corolla lobes more or less papillate, tips mostly in- 
flexed.34. C. indecora. 
Flowers not fleshy, corolla lobes not inflexed at the tips. 
Infrastamineal scales present. 
Pedicels mostly longer than the flowers, calyx lobes triangular. 
35. C. glohosa. 
Pedicels no longer than the flowers (mostly shorter), calyx 
lobes ovate. 
Corolla lobes mostly shorter than the tube.36. C. micrantha. 
Corolla lobes mostly equal to or longer than the tube.37. C. acuta. 
Infrastamineal scales lacking...38. C. insquamata. 
25. Cuscuta obtusiflora Humboldt, Bonpland, & Kunth 
(PL V, fig. 29, A-E) 
Cuscuta obtusiflora Humboldt, Bonpland, & Kunth, Nova gen. et spec. pi. 3: 122 (96 in 
folio edition). 1818.—Engelmann, Trans. Acad. Sci. St. Louis 1: 492. 1859.—Progel 
in Martius, Flora Brasiliensis 7: 380, PI. 127, fig. 1. 1871. 
Cuscuta inodora Willdenow, in herb., ex Engelmann, Trans. Acad. Sci. St. Louis 1: 492. 
1859; in synon. 
Stems medium. Flowers 2-2.5 mm - long? subsessile in dense glomeru- 
late clusters, more or less glandulous; calyx scarcely as long as the corolla; 
lobes unequal, ovate, obtuse, not overlapping; corolla campanulate; lobes 
about equal to the tube, ovate, obtuse or more rarely acutish, upright, 
becoming reflexed in fruit; stamens shorter than or nearly equaling the 
lobes and commonly placed directly in the sinuses, stout, subulate filaments 
longer than the oval anthers; scales spatulate, fringed about the top, 
mostly not reaching the stamens, bridged below the middle; styles about 
as long as the globose ovary, becoming subulate. Capsule depressed- 
globose, exposed, with the withered corolla about it towards the base, 
intrastylar aperture large, styles becoming subulate and divergent; seeds 
globose, compressed, slightly rostrate, 1.25-1.5 mm. long; hilum linear, 
perpendicular. 
All the specimens from South America belong to Engelmann’s variety 
vera. The above description was drawn from Humboldt’s type specimen. 
Type locality: In the Peruvian Andes. Distribution: Colombia, Brazil, 
and southward to Peru and in Paraguay and Uruguay. 
Specimens examined: Brazil: Matto Grosso, Corumba (Hoehne 4016). 
Colombia: (Triana, without date or number); Medellin (Triana 2178, and in 1851-57). 
Paraguay: River Ypacarai (Hassler 3918). 
Peru: (Humboldt, the type, a fragment in the Engelmann herbarium). 
Uruguay: (Lorentz 64). 
