?©8 AGGREGATE FLOWEIIS. 



teeth, as in Tragopogon, t. 434, and the 

 Dandelion ; or tubulosi, tubular, cylindrical 

 and 5-cleft, as in Oarduus, t. 107 5 and Tana- 

 cctum, t. 1220* The marginal white florets 

 of the Daisy are of the former description, 

 and compose its radius, or rays, and its yel- 

 low central ones come under the latter deno- 

 mination, constituting its discus, or disk. The 

 disk of such flowers is most frequently yel- 

 low, the rays yellow, white, red, or blue. 

 No instance is known of yellow raj T s with a 

 white, red, or blue disk. 



An Aggregate flower has a common undi- 

 vided Receptacle, the Anthers all separate 

 and distant, Jetstone only, Engl. Bat. t 882. 

 having them united at the base, but not into 

 a cylinder, «ad the florets commonly stand 

 en stalks, each having a single or double par- 

 tial calyx. Such flowers have rarely any in- 

 ■clination to yellow, but arc blue, purple, or 

 white. Instances a re found in Scdhiosa, t. 659 

 and 1511, Dipsacus, t. 1()3 C 2 and 8/7, and 

 the beautiful Cape genus Froiea. 



Such is the trite .ilea of an Aggregate 

 Sow ;. but I ::v.vv i? eivurn&fitejs, under that 



