DESCRIPTIVE MANUAL 



287 



natifid, lobes roundish or obtuse and repand, covered with soft 

 pubescence; hairs stellate, flowers yellow, corolla gamopetalous, 

 about an inch, in diameter, nearly regular, the sharp lobes of the 

 corolla broadly ovate; stamens 5, declined, anthers tapering up- 

 ward, linear-lanceolate, dissimilar, the lowest much larger and 

 longer, with an incurved beak, hence the technical name rostmtum; 

 style much declined; fruit a berry but enclosed by the close-fitting 

 or prickly calyx, which has suggested the common name buffalo 

 bur; pedicels in fruit erect; seeds thick, irregular, round or some- 

 what longer than broad, wrinkled, showing numerous small pits 

 and surrounded by a gelatinous substance. 



Fig. 165-B. Buffalo Bur iSolanum rostratum) ; a, general sketch showing 



habit of plant ; T>, flower ; d^ seed natural size ; c, seed enlarged. 



(After Dewey, U. S. Dept. of Agr.) 



