MODE OF EXPANSION. 95 
** Flowers not placed on stalks, 
arranged upon a lengthened axis, | 
* which is permanent, Spike, Locusta, Spadizx, 
which is deciduous, Catkin, 
arranged upon a depressed axis, Capitulum, Anthodium. 
Flowers placed upon distinct stalks, 
arranged upon a lengthened axis; 
Stalks simple. 
and of equal length, Raceme, 
the lowermost the longest, 
Inflorescence centripetal, Corymé, 
entrifugal, Fascicle. 
Stalks branched, 
Inflorescence lengthened and 
centripetal, Panicle, 
depressed, and 
entrifugal, Cyme, Verticillaster ; 
arranged upon a depressed axis, Umbel.” 
———_ 
Vv. MODE OF EXPANSION. 
332. The flower buds open in a certain order—sometimes 
_ the upper or central flowers expand first, and then gradually 
_ the lower or outer ones. This method of expansion is termed 
_ Cewrrirveat. In other cases the lower or outer buds ex- 
_ pand first, and then the opening spreads towards the upper 
_ or central florets. This is termed CentRIrETAL. 
___ 333. When the expansion is centrifugal, it is considered 
that the bunch of flowers have originated from the growth of 
several peduncles or branches; and the inflorescence is some- 
times termed compound. Each bunch, however, of flowers, — 
©xpands centripetally, though the whole opens centrifugally. 
334. When the expansion is centripetal, it is considered 
panama apace 
335. In some cases the | 
hl ing ty sed er of hore 
that the flowers proceed from the growth ofa sucinteenee ae 
