108 YuUNKER: NEW SPECIES OF CUSCUTA 
species, however, in the color of the flowers, and in the shape of 
the scales and of the calyx and corolla lobes. It superficially 
resembles Cuscuta partita Choisy, but differs from that species 
in possessing shorter corolla lobes, dentate scales, shorter fila- 
ments and larger flowers. 
The only specimen examined was from Los Pinitos, Sonora, 
Mexico (Hartman 119), the type, in the Gray Herbarium. 
Cuscuta cozumeliensis sp. nov. 
Stems rather coarse. Flowers 4-5 mm. long, on pedicels 
about as long as, or shorter than, the flowers, in cymose clusters; 
calyx shorter than the corolla tube, lobes ovate-orbicular, over- 
lapping, somewhat fleshy toward the base, margins very uneven; 
corolla campanulate, lobes much shorter than the tube, erect 
or spreading, overlapping, obtuse or rarely slightly acutish, 
margins uneven; stamens shorter than the lobes, filaments 
stoutish, about equal to, or slightly longer than, the oval anthers; 
scales not reaching the stamens, oblong, moderately fringed 
Fic. 2. CuscuTa COZUMELIENSIS Yuncker 
, Flower, X 5. B. Opened corolla, X 5. C. Opened calyx, X 5: D. 
Individual scale, X 10. E. Ovary, X 5. 
fragmentary and not ripe enough to show capsules. The ovary, 
owever, gives indications that the capsule would be definitely 
circumscissile and probably carry the withered corolla about it. 
This species falls in section EuGRAMMICA, subsection OB- 
TUSILOBAE, near Cuscuta macrocephala Schaffner, from which it 
differs in the stamens not being sessile as they are in that species, 
and in having smaller stigmas and longer processes on the scales. 
