60 ILLINOIS BIOLOGICAL MONOGRAPHS [150 



of the corolla tube; corolla globular, becoming urceolate, lobes upright or 

 more or less connivent, triangular, acute, less than half as long as the 

 corolla tube, not overlapping; scales represented only by ridges and short 

 bridges; stamens much shorter than the corolla lobes; filaments about equal 

 to the small, oval anthers; styles much shorter than the globose, slightly 

 pointed ovary. Capsule depressed-globose, somewhat elevated about the 

 intrastylar aperture, surrounded by the persistent corolla; seeds 2-4 in a 

 capsule, rounded, compressed. 



This species, which appears to be rare, differs greatly in many respects 

 from C. calif omica, the only other North American species lacking infra- 

 stamineal scales. It differs from C. sandwichiana, a species not recorded 

 from North America, which it resembles somewhat, in the fleshier texture 

 of the whole plant, the size of the flowers and the shape of the corolla. 



Type locality: Big Horse Mountain, South Fork of the Eel River, 

 California. 



Specimens examined: United States: California; Big Horse Mountain, South Fork 

 of the Eel River (Jepson 5c, the type, in the Univ. Calif. Herb.). 



Cuscuta calif omica Choisy 



C. californica Choisy, Mem. Soc. Phys. et Hist. Nat. Geneve, 9:279, 1841;. and in DC, Pro- 

 dromus, 9:457, 1845.— Engelmann, Trans. Acad. Sci. St. Louis, 1:498, 1859. 



C. acuminata Nuttall in Engelmann, Trans. Acad. Sci. St. Louis, 1:498, 1859; nomen nudum, 

 in synon. 



Stems slender. Flowers 2-5 mm. long, glabrous or papillate, sub- 

 sessile in compact clusters or on slender pedicels in loose panicled cymes; 

 calyx as long as the corolla tube or shorter; lobes lanceolate, acute to 

 acuminate, or shorter, ovate and somewhat obtuse, their tips frequently 

 somewhat divergent; corolla campanulate or cylindrical; lobes ovate to 

 lanceolate, acute or somewhat obtuse, as long as or longer than the tube, 

 connivent to spreading or reflexed; scales rudimentary, represented only 

 by shor# bridges or "inverted arches"; stamens shorter than the lobes; 

 filaments shorter than or slightly longer than the oval to linear anthers; 

 styles as long as or longer than the somewhat ovate or conic ovary. Capsule 

 globose or ovoid-conic, enveloped by the withered corolla; seeds about 

 1 mm. long, oval, slightly compressed, rather rostrate, one to four in each 

 capsule; hilum oblong, transverse or oblique. 



Key to the varieties 

 Capsule globose, not pointed. 

 Flowers glabrous. 



Anthers on definite filaments. 



Calyx lobes acute to acuminate, usually reaching at least the middle of the 

 corolla tube. 

 Flowers more or less pedicelled; styles as long as, or longer than the ovary 



graciliflora 



Flowers subsessile; styles shorter than the ovary breviflora 



