ORDER FRUSTRANEA. 173 



every garden, 3 or 4 remarkable and beautiful species, 

 some of them perennial, not yet published, have been 

 discovered near the Rocky Mountains. In one of 

 these the flowers are yellow. 



FRUSTRANEA. 



This order likewise consists of radiated flowers re- 

 sembling the last section pf the preceding, and merely 

 differ in the condition of the rays, which are neutral ; 

 mere ligulate florets, almost petals, without either style 

 or stamens, though provided with the rudiments of 

 the seed at their base. 



The fust and most obvious genus, with these con- 

 ditions, is the Hclianthus, or Sunflower, also, an ex- 

 clusive American genus. The II. animus becoming 

 of such gigantic dimensions as to afford in its enor- 

 mous flowers, not only, a good example of its order, 

 but also of the characters of the class. The calyx is 

 imbricate, somewhat squarrose and leafy. The re- 

 ceptacle chaffy, and flat. The pappus 2 caducous 

 (or quickly shed) chaffy leaves. 



In Rudoeckia, a genus also exclusively American, 

 the leaves of the calyx are nearly equal, and common- 

 ly arranged in a double series. The receptacle is 

 conic, and provided with chaff. The pappus a 4- 

 toothed margin, or nearly indistinct. The common 

 species, in gardens, and wild in the southern states, 

 has purple flowers, and long pendulous rays, with the 

 receptacular chaff colored and pungently rigid. In 

 those with yellow flowers it is often blunt ; one of 

 these, the R. laciniata, is the giant of our swamps and 

 wet places, having pinnately-divided, 3-lobed leaflets, 

 and produces yellow flowers, somewhat resembling 

 those of HcUanthus. 



But one of the most elegant genera in the United 

 15* 



