MACLOSKIE : COMPOSITE. 825 



seriate, carinate, embracing the outer achenes. Disk-flowers tubular, 

 5-cleft, their styles appendaged. Anthers basiobtuse. Achenes of ray 

 obovate-oblong, often laterally compressed and incurved. Pappus none. 

 Species 8, in Western N. Amer., and to Chili, etc. 



MADIA SATIVA Molin. 



Lower leaves opposite, upper alternate, semiamplexicaul, oblong, en- 

 tire. (Fig. in Eng. & Prantl, iv, 5, p. 249, C.) 



(Chili, where an oil is expressed from its seeds, and it is cultivated) ; 

 Patagon. ; Magellan; N. and E. Fuegia (Dusen, "a steppe plant; rather 

 rare in Fuegia "). 



42. FLAVERIA Juss. 



Herbs often yellowish, with opposite, narrow leaves and heads with few, 

 to only i, flowers, all fertile. Involucral scales 2-4, long, subequal, 

 sometimes with small, outer scales. Receptacle naked. Ray-flowers with 

 very short ligules. Anthers basiobtuse. Style-branches of disk truncate. 

 Achenes 8-io-costate. Pappus none. Corollas yellow. 



Species 8, of which 2 are spread over the whole tropics, especially in 

 W. Amer. One of these, F. contrayerva Pers. (fig. in Eng. & Prantl, 

 iv, 5, p. 259), is used as a vermifuge. F. australasica Hook., of tropical 

 E. Australia, is allied to species in S. Amer., W. Indies and Florida. 



A species (undescribed) belonging to S. Argentina may be expected in 

 N. Patagon. 



43. VILLANOVA Lag. 



Diffuse, glandular, pubescent herbs, with at least the lower leaves oppo- 

 site, dissected ; and with small or midsized peduncled heads of yellow 

 flowers panicled or corymbose. Ray- and disk-flowers usually fertile. In- 

 volucre broad, its scales few, subequal, green, subtending the ray-flowers. 

 Receptacle small, naked. Anthers basisagittate. Style branches acute. 

 Achenes cuneate-oblong, truncate, triquetrous, glabrous. Pappus none. 



Species 8, Colorado to Patagon. 



V. PINNATIFIDA Lag. 



Annual, with ternatisect leaves, opposite below, alternate upwards, their 

 segments pinnatifid. 

 Magellan. 



