334 



imbricated. Flor. of the radius numerous, linear, 

 very narrow. Anth. simple. 



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

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

 the radius about 5. 



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

 bricated ; lowermost scales spreading. Flor. of the 

 radius more than 10. 



398. SENECIO. Recept. naked. Doun 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. DoKim simple. Cal. 

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

 somewhat membranous. Seed obovate, compressed. 



402. CINERARIA. Recept. naked. Do'uon 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. Doxm non-e. Cal. 



ovate ; scales imbricated, unequal. Flor. of the 

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



Bidens 2, 



Order III. POLYGAMIA FRUSTBANEA, 



Florets of the disk perfect and fertile; those 

 of the circumference neuter. 



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



feathery, rarely wanting. Flor. of the radius funnel- 

 shaped, dilated, irregular, without stamens or style. 



A natural tribe, consisting of the genuine Compound Flo^m- 

 ers, having a common calyx, and ccmibined anthers. 



Composite. Linn. 49. Cinarocephalce, 5^', Cichoracet^, 53; 

 and Corijmhifcree, 55, of Jussieu. See Grammar 1 20 — 1 25. 



