Some horticulture plants are grown primarily for their vegetative parts. Other are grown for the flowers, fruits, or seed which they produce.  
Inflorescence :
Al;though the flowers of many plants are borne singly on stalks or stems known as pedicels, in numerous other cases the flowers are cases the flowers are borne in clusters known as inflorescence. The principle parts of the inflorescence are the peduncle, pedicels, and individual flowers.
 The peduncle is the main stem or central axis. Form it arise the pedicabs or in many cases the flowers directly without pedicabs. A flower, then many be borne one a pedicel or it may be attached to the main axis pr peducle without any stalk or pedical, in which case it is known as sessile. The area of attachment of the flower to the pedicel, or in the absence of a pedicel, to the peduncle is known as the receptacle.There are several distinct types of inflorescence,such as spike, raceme, corymb head, fascicle, and glomerule, based upon the position an relationships of the different parts. A determinate inflorescence, for example, is one in which the inflorescence is on in which the terminal remains vegetative, with flowers borne laterally as in the cabbage and hyacinth. In some cases the peduncle is branched, giving rise to a compound inflorescence.In some flower clusters both simple and compound types are represented. this is true in the Grape and cabbage.t
Flowers :
The flower is the forerunner of the fruit and seed. In order to consider the proceed that result in fruit and seed formation, it is important to give some though of flowers. There are two essential parts of the stigma, the style, and the ovary, which is the lower, enlarged portion. In it are borne the ovules, which when mature, become seeds. The style forms the connection between the ovary and stigma, and through it the pollen tube passes on its way into the ovary. The stigma represents the upper portion of the pistil; its receives the pollen and affords a favorable medium for its germination.

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