361] FLORA OF COLUMBIA AND VICINITY 2I9 



distant; under surfaces rugose and softly tomentose, upper 

 surfaces slightly rough; cymes seldom broad, usually 1-3 dm., 

 and somewhat compact, the branches short, the central 

 heads sessile; peduncles only very slightly thickened up- 

 wards; heads small, hemispheric-campanulate, 4-5 mm. high; 

 bracts greenish with dusky tips, ovate-lanceolate, squarrose, 

 the tips strongly reflexed; pappus light yellow to light buff 

 with no tinge of purple; achenes 21^-3 mm. long, minutely 

 barbed on the ribs. The specific name refers to the color of 

 the pappus. 



Not infrequent in wild pastures east of Columbia. The 

 plant resembles V. Baldivi7iii Torr. except in the color of 

 the pappus and the somewhat smaller heads. 



907. V. parthenioides Daniels. Nov. spec. 



Plant I to 2 metres in height, the stem, especially the upper 

 portion, canescent, with fine dense, but short, tomentum. 

 Leaves broadly ovate, 4-5 cm. wide in the middle, 

 thence tapering rather evenly to each end, the leaves being 

 from 6-9 cm. long; the apices acute, but never acuminate. 

 The cauline leaves are, with the exception of those subtend- 

 ing branches of the inflorescence, all distinctly petioled, the 

 petioles from J^-i cm. long. Leaves finely scabrous on the 

 upper surfaces, on the under surfaces soft with fine whitish 

 glandular tomentum, which is not flocculentor villous. The 

 midrib and divaricate veins are white and very prominent 

 underneath, but whitish and noticeable also above. The 

 margins of the leaves are coarsely and doubly serrate with 

 falcate teeth. The cymes range from small to ample, the 

 heads being for the most part stout-peduncled, 20-30 flow- 

 ered, involucres hemispheric, 7^2-10 mm. broad, the bracts 

 ovate, purplish with a green midrib, the margins ciliate, the 

 attenuate tips recurved usually to one side; pappus purplish 

 brown, the achenes hispidulous. 



Half-wild and wild fields, Columbia, Mo. The plant ap- 

 pears very distinct from V. .5«/rftw«2V Torr., especially in the 

 broadly ovate deeply and falcately serrate leaves, which re- 

 semble strikingly those of Parthenium integrifolium L., 

 whence the specific name. 



