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PHARMACEUTICAL BOTANY 
The raceme, corymb, umbel, etc., are frequently compounded. 
The compound raceme, or raceme with branched pedicels, is called a 
panicle. Examples: Yucca and paniculate inflorescence of the oat. 
A Thyrstis is a compact panicle, of a pyramidal or oblong shape. 
Examples: Lilac, Grape and Rhus glabra. 
A Mixed Anthotaxy is one in which the determinate and indeter- 
minate plans are combined, and illustrations of this are of frequent 
occurrence. 
Fig. 64. — Cymose inflorescences. F, A terminal flower; G, a simple cyme; H, 
a compound cyme. ( From Hamaker.) 
The order of flower development is termed ascending when, as in 
the raceme, the blossoms open first at the lower point on the axis and 
continue to the apex. Examples: WhiteLily, and many other plants 
of the same family. In the cyme the development is centrifugal, the 
central florets opening first, while in the corymb it is centripetal, or 
from margin to center. 
PREFLORATION 
Prefloration. — By prefloration is meant the arrangement of the 
floral envelopes in the bud. It is to the flower bud what vernation is 
to the leaf bud, the same descriptive terms being largely employed, as 
convolute, involute, revolute, plicate, imbricate, etc. 
In addition to those already defined, the following are important. 
