260 PHARMACEUTICAL BOTANY 
center to margin. If the floral axis is elongated, the order of 
flower development is descending, or from apex to base; if more or 
less ‘‘flat topped,” the order is centrifugal, or from center to 
margin. ‘The principal varieties are: 
The Soxirary DETERMINATE, in which there is a single flower 
borne on the scape, as in the Anemone, or Windflower, the Tulip, 
and Hydrastis. 
The Cyme, a flower cluster resembling a corymb, except that 
the flower buds develop and open from center to circumference. 
Oo Pp © , 
WY Wy 
es 
VY 
be ef 
F G H 
Fic, 175.—Cymose inflorescences. F, A terminal flower; G, a simple cyme; H, 
acompound cyme. (From Hamaker.) 
The simplest kind of cyme is seen in the flower cluster of the 
Linden tree, where a peduncle (arising from a large bract) is 
elongated into a rachis which ends in a flower bud. At the 
junction of the rachis with the peduncle, 2 bracteoles arise. In 
the axil of each of these bracts a bud is formed which elongates in 
each instance into a pedicel bearing a flower bud at its end. 
This type of cyme is called a SimptE Cyme. If each of the 
pedicels give rise to a pair of bracts from the axils of which 
secondary pedicels arise bearing flowers, a type of compound cyme 
arises called a DicuastaL Cymer. 
A Scorpiomw Cymer imitates a raceme, having the flowers 
pedicelled and arranged along alternate sides of a lengthened 
axis. These open in right-left hand fashion from summit to 
base. Example: Sundew. 
