Monography of the North American Cuscutinece. 341 



but roundish and obtuse. The angles are formed by the margins 

 of the lobes of the calyx and correspond with the petals, while 

 in C Coryli the five angles, formed by the five prominent mid- 

 ribs, alternate with the lobes of the corolla. 



6. CUSCUTA VERRUCOSA, 71. Sp. 



Stem low, branching ; cymes loose, few-flowered ; flowers 

 (small), long-pednncled, 5-parted; tube of the corolla campanu- 

 late, shorter than the lanceolate acuminate lobes, and nearly 

 equal to the ovate subacute segments of the verrucose or some- 

 what hispid calyx ; scales ovate, fimbriate, equalling the tube ; 

 styles as long as the ovary ; capsule globose, surrounded at the 

 base by the persistent corolla. 



Var. a. HispiDULA : inflorescence, and frequently also the branch- 

 es, hispid or glandular-pilose ; lobes of the calyx acute, shorter 

 than the tube of the corolla. 



§. GLABRioR : cymes more or less glabrous, lobes of the calyx 

 broader, somewhat obtuse, nearly as long as the tube of the co- 

 rolla. 



Texas : var. «. in dry sterile prairies, west of Houston, on Eu- 

 thamia, Schrankia, Aster, Ambrosia, Evolvulus, and other low 

 herbs ; flowering in April and May, F. Lindheimer. ^. with 

 the preceding variety, F. Lindheimer : on Petalostemon, Drum- 

 mond, (3d collection. No. 247.) 



This species is the lowest of all the American Cuscutse, and 

 has, together with the foregoing, the smallest flowers ; it grows 

 on open prairies, in dry soil : in all these respects therefore it 

 takes in Texas the place of Cuscuta EpithymMni in Europe. 

 Like that species it is not restricted to a few plants, but appears 

 to creep over every thing in its way. It is the only Cuscuta 

 known to me with any appearance of pubescence. 



Stem from four to six inches high, smooth ((?.) or more or less 

 hispidly pubescent with pellucid vesicular hairs, (a.) especially in 

 the inflorescence. Peduncles filiform, many times longer than 

 the flowers. Calyx always rough, but the vesicles less hair-like, 

 more glandular, or when dry like warts. In flowering, the ca- 

 lyx is campanulate, or even somewhat turbinate, but soon after 

 assumes a hemispherical shape, which is the one figured in the 

 plate. Lobes of the corolla very acute, spreading, white ; after 

 flowering the tips incurved, turning brown. Stigmas globose, 

 purplish-brown. 



