ORGANS OF REPEODUCTION. 



Fig. 402. 



197 



Fig. 403. 



Fig. 402. Capitulum of Sca- 

 bious (Scahinsii). The 

 outermost florets may be 

 observed t<> l)e nmre ex- 



panded than the inner. 



Fig. 403. Simiile umbel of 

 a species of Allium. 



(Jig. 404). This is seen in the Carrot {Jig. 372), the Fennel (Jig. 

 404), the Foors Parsley, the Hemlock, and other allied plants, 

 which are hence called umbelliferous, and give the name to the 

 natural order Umbelliferae. In the compound umbel (fig. 404), 

 the primary 

 umbel a is 

 called the 

 general um- 

 bel, and the 

 others, h, b, 

 formed by the 

 divisions of 

 this, partial 

 umbels or um- 

 bell III es. When 

 the base of the 



general umbel is surrounded 

 by a whorl of bracts {fg. 372, fl) 

 they constitute a. gemral invo- 

 lucre, and if other bracts are 

 arranged in a similar manner 

 around the partial umbels b, b, 



each whorl of })racts forms an . . », , * t> 



, , ^ ■ 7 • 7 Fig. 404. Compound unibel of Fennel 



ZnvolUCd or partial involucre. (Fanicnlum). a. General umbel. o,&, 6. 



Partial umbels or umbellules. 



