674 



SCIENTIFIC AND APPLIED PHARMACOGNOSY 



having a diameter of 1 mm. ; cylindrical, grayish- or yellowish-green, 

 pubescent and having 9 to 12 prominent ribs. 



Persian Flowers. Heads flattened top-shaped, about 12 mm. in 

 diameter, and resembling the Dalmatian flowers. The involucral 

 scales are greenish-brown having a dark brown membranous margin: 



Fid. 296. A portion of a plot of Chrysanthemum cinerariifolium, the flowers, 

 which somewhat resemble the common white or field daisy, furnish the Dal- 

 matian insect powder. After Newcomb. 



the ray florets are reddish-brown or reddish-purple, attaining a length 

 of 15 mm., being somewhat plicate, unequally blunt, 3-toothed and 

 having 7 veins; disk florets tubular, yellow, the corolla scarcely 

 longer than the brownish, 10-striate ovary, the latter having a mem- 

 branous pappus. 



