131] NORTH AMERICAN AND WEST INDIAN CUSCUTA—YUNCKER 41 



than the flowers; calyx lobes triangular or lanceolate, acute to acuminate, 

 longer than the corolla tube and more or less spreading at the tips; corolla 

 campanulate; lobes longer than the tube, erect to spreading and sometimes 

 reflexed in fruit, lanceolate, acuminate; scales shorter than the tube, oblong, 

 sparingly fringed with short processes about the upper part, or reduced to 

 wings on either side of the filament attachment; stamens shorter than the 

 lobes; filaments longer than the small, oval to oblong anthers; styles longer 

 than the small, globose ovary; stigmas capitate. Capsule with the 

 marcescent corolla at the apex, globose, thin, circumscissile, usually 3-4 

 seeded; seeds roundish, ovoid, about 1 mm. long, compressed, angled, 

 hilum short, oblong, oblique. 



This species is named in honor of Charles Des Moulins, one of the 

 monographers of this genus. 



Type locality: Hills near Altar, Sonora, Mexico. 



Specimens examined: Mexico: Sonora; Hills near Altar (Pringle 105, the type, in 

 the Columbia College Herb, now at the N. Y. Bot. Gard.). This specimen seems to be a 

 mixture of the following two distinguishable varieties. 



Cuscnta desmouliniana typica n. var. 

 [Figures 25 a-e and 67] 

 Lobes of the calyx and corolla triangular-acute to acuminate; scales 

 fully developed, fringed. 



Cuscuta desmouliniana attenuiloba n. var. 

 [Figure 25 f-h] 

 Lobes of the calyx and corolla narrowly lanceolate, acuminate; scales 

 reduced to wings on either side of the filament attachment. 



Cuscuta umbellata Humboldt, Bonpland & Kunth 



C. umbellata Humboldt, Bonpland & Kunth, Nov. Gen. Sp. PI., 3:95, 1818. — Choisy, Mem. 

 Soc. Phys. et Hist. Nat. Geneve, 9:284, 1841; and in DC, Prodromus, 9:460, 1845 — 

 Engelmann, Trans. Acad. Sci. St. Louis, 1:487, 1859. — Progel in Martius, Fl. Brasilien- 

 sis, 7:386, pi. 128, figs. 7 & 8, 1871. 



C. parviflora Willdenow in Engelmann, Trans. Acad. Sci. St. Louis, 1 :487, 1859; in synon. 



Stems slender. Flowers glabrous or infrequently slightly puberulent, 

 2-6 mm. long, pentamerous, on pedicels longer or shorter than the flowers, 

 forming rather dense compound cymes, the ultimate umbellate divisions 

 of 3-7 flowers; calyx turbinate, as long as or longer than the campanulate 

 corolla; lobes ovate-triangular, acute to acuminate; corolla lobes as long 

 as or longer than the tube, reflexed, lanceolate or somewhat oblong, acute 

 to acuminate; scales somewhat obovate or spatulate, moderately fringed 

 with medium length processes, reaching the filaments or slightly exserted, 

 or shorter in one variety, bridged at about a third or less of their height; 

 stamens shorter than the lobes; anthers oblong to oval, shorter than or 

 equalling the filaments; styles longer than the globose ovary; stigmas 

 capitate. Capsule globose, depressed, with a ring or collar of thickened 



