153] NORTH AMERICAN AND WEST INDIAN CUSCUTA—YUNCKER 63 



Type locality: "On the Colorado," California. 



Specimens examined: United States: California; On the Colorado (Bigelow in 1854, 

 the type, in the Engelmann Herb.). 



Cuscuta harperi Small 

 [Figures 21, 123 and 134] 



C. harperi Small, Flora of the Southeastern United States, (2 ed.), p. 1361, 1913. 



Stems very slender. Flowers penta-, tetra- or trimerous, about 1 mm. 

 long, on pedicels mostly as long as or longer than the flowers in loose race- 

 mose clusters; calyx shallow, the lobes short, broadly ovate, obtuse, 

 frequently slightly keeled and tuberculate; corolla campanulate; lobes 

 triangular-ovate, acute, about equalling the tube, upright, slightly fleshy, 

 with their tips inflexed, in fruit upright or reflexed; scales narrow, fringed 

 with a few short processes particularly about the upper half, as long as or 

 somewhat longer than the corolla tube, bridged at about one-third their 

 height; stamens shorter than the lobes, filaments slightly tapering and 

 equal to the small, oval anthers; ovary globose-oval, with a slightly 

 thickened collar about the intrastylar aperture; styles slender, shorter 

 than the ovary; stigmas capitate. Capsule oval, with the withered 

 corolla at its base; seeds about 1—1.2 mm. long, ordinarily but one in a 

 capsule, yellow brown, somewhat spherical; hilum a fine line, transverse or 

 oblique, the umbilical area somewhat sunken. 



This species seems to be rather rare. It closely resembles some of the 

 smaller specimens of C. pentagona typica, from which it differs in the shape 

 of its scales, calyx and capsule. 



Type locality: Etowah Co., Alabama. Range: Northern Alabama. 



Specimens examined: United States: Alabama; Etowah Co. (Harper 147, taken 

 as the type, in the N. Y. Bot. Gard. Herb., Pollard & Maxon 341), De Soto Falls (Ruth 493, 

 and in 1893). 



Cuscuta rostrata Shuttleworth 

 [Figures 40, 102, 103 and 139] 



C. rostrata Shuttleworth in Engelmann, Bost. Journ. Nat. Hist., 5:225, 1847. — Engelmann, 

 Trans. Acad. Sci. St. Louis, 1:508, 1859.— Matthew, Bull. Torr. Bot. Club, 20, pi. 165, 

 fig. 10, 1893— Britton & Brown, Illustr. Flora, 3:30, fig. 2964, 1898; 2 ed., 3:51, fig. 3450, 

 1913. 



C. oxycarpa Engelmann, Bost. Journ. Nat. Hist., 5:225, 1847, in synon. 



Stems coarse. Flowers glabrous, 4-6 mm. long, pentamerous, on 

 pedicels shorter than the flowers in compact, paniculate cymes; calyx 

 shorter than the campanulate corolla; lobes ovate, obtuse, overlapping; 

 corolla membranaceous, cells very evident, somewhat thickened lines 

 running lengthwise below the stamen insertions giving the corolla a rather 

 angled appearance; lobes shorter than the tube, broad, ovate, obtuse, 

 erect, becoming spreading and later reflexed in fruit; scales shorter than 

 the tube, oblong, deeply fringed with long processes, shorter processes 

 frequently evident on the bridge which is about a third of their height; 



