308 AGGREGATE FLOWERS. 



or 5 teeth, as in Tragopogon.) f. 434, and the 

 Dandehon ; or iubulosi, tubular, cvhndrical 

 and 5-cleft, as inCardiius^ t. 107, and Tana- 

 cefiim, f. 1229. The marginal white florets of 

 the Daisy, /'. 2 1 1, are of the former description, 

 and compose its radius, or rays, and its yellow 

 central ones come under the latter denomina- 

 tion, f, 212, constituting its fliscits, or disk. 

 The disk of such flowers is most frequently 

 yellow, the rays yellow, Avhite, red, or blue. 

 No instance is known of yellow rav^ ^vith a 

 white, red, or blue disk. 



An Aggregate flower has a common undi- 

 vided Receptacle, the Anthers all separate 

 and distant, Jasione only, Engl. Bot. t. 882, 

 having them united at the base, but not into 

 a cylinder, and the florets commonly stand 

 on stalks, each having a single or double par- 

 tial calyx. Such flowers have rarel}^ any in- 

 clination to yellow, but are blue, purple, or 

 white. Instances are found in Scahiosa, t. 6d^ 

 and 1311, DipsacMS, t. 1032 and 877, and 

 the beautiful Cape genus Protea. 



Such is tlie true idea of an Asrsrreoate 

 flower, but Linnaeus enumerates, under that 



