334 



imbricated. Flor, of the radius numerous, linear, 

 very narrow. Anth. simple. 



400. SOLIDAGO. Recept. naked, pitted. Doxson sim- 

 ple. Cal. imbricated, with close scales. Flor. of 

 the radius about 5. 



399. ASTER. Recept. naked. Doxim simple. Cal. im- 

 bricated ; lowermost scales spreading. Flo7-. of the 

 radius more than 10. 



398. SENECIO. Recept. naked. Doxmi simple. Cal. 

 double; the innermost cylindrical, of numerous 

 equal scales ; outer of several minute ones ; scales 

 all withered at the extremity. 



397. TUSSILAGO. Recept. naked. Down simple. Cal. 

 simple, tumid at the base ; scales numerous, equal, 

 somewhat membranous. Seed obovate, compressed. 



402. CINERARIA. Recept. naked. Doiim simple. Cal. 

 simple, cylindrical ; scales numerous, equal. Seed 

 quadrangular. 



408. ANTHEMIS. Recept. chaffy. Seed crowned with 



a slight border. Cal. hemispherical ; scales nearly 

 equal. Flor. of the radius numerous, oblong. 



409. ACHILLEA. Recept. chaffy. Devon none. Cal. 



ovate; scales imbricated, unequal. Flor. of the 

 radius 5 — 10, roundish, somewhat heart-shaped. 



Bidens 2. 



OrderlU. POLYGAMIA FRUSTRANEA, 



Florets of the disk perfect and fertile; those 

 of the circumference neuter. 



410. CENTAUREA. Recept. bristly. Dotion simple, or 



feathery, rarely wanting. Flor. of the radius I'unnel- 

 shaped, dilated, irregular, without stamens or style. 



A natural tribe, consisting of the genuine Compoimd Floxio- 

 ers, having a commo?i calyx, and combined anthers. 



Composite. Linn. 49. Cinarocephal(C,5'^; Cichoracece, 53; 

 and Corymhiferce, 55, of Jussieu. See Gravimar 120 — 125. 



