242 COMPOUND FLOWERS- 



such flowers monoid, monoecious, as confined to one 

 house or dwelling ; if the barren and fertile flowers 

 grow from two separate roots, they are said to be dioici, 

 dioecious. Some plants have united flowers and separa- 

 ted ones in the same species, either from one, two or 

 three roots, and such are called polygamous, as making 

 a sort of compound household. 



A Compound flower consists of numerous florets,^oy- 

 culi, all sessile on a common undivided Receptacle, and 

 enclosed in one contiguous Calyx or Perianthium. It is 

 also essential to this kind of flower that the Anthers should 

 be united into a cylinder, to which only the genus Tus- 

 silago affords one or two exceptions, and KiiJmia anoth- 

 er ; and moreover, that the stamens should be 5 to each 

 floret, Sigesbeckia Jiosculosa of L'Heritier, Stirp, Nov. 

 t. 19, alone having but 3. The florets are always mo- 

 nopetalous and superior, each standing on a solitary na- 

 ked seed, or at least the rudiments of one, though not al- 

 ways perfected. Some Compound flowers consist of 

 very few florets, as Humea elegans, Exot. Bot. t. 1, 

 Prenanthes muralis, Engl. Bot. t. 457 ; others of many, 

 as the Thistle, Daisy, Sunflower, &c. The florets them- 

 selves are of two kinds, Ugiilati, ligulate, shaped like a 

 strap or ribband,/ 210, with 3 or 5 teeth, as in Trago- 

 pogon, t. 434, and the Dandelion ; or tubulosi, tubular, 

 cylindrical and 5-cleft, as in Cardials, t. 107, and Tana- 

 cetum, t. 1229. The marginal white florets of the 

 Daisy,/ 211, are of the former description, and com- 

 pose its radius, or rays, and its yellow central ones come 

 under the latter denomination,/ 212, constituting its 

 discus, or disk. The disk of such flowers is most fre. 



