Growth of plant organs can occur according to two different schemes:
Monopodial
Sympodial
In monopodial scheme of growth, the terminal bud continues to grow and remains intact. It grows as a leader shoot. The lateral branching occurs with the help of axillary buds. There is a single growing point, hence monopodial.
In indeterminate inflorescence, the terminal bud does not cease to grow and never forms terminal flower. The lateral flowers and formed. Such inflorescences are also open inflorescences.
In determinate inflorescences, the terminal bud develops into terminal bud. It ceases to grow. The lateral flowers take over the main branching. Such inflorescences are also closed inflorescences.
Depending on whether the apex gets converted into a flower or continues to grow, there are two major types of inflorescences:
Racemose: it is indeterminate and open type of inflorescence
Cymose: it is determinate and closed type of inflorescence
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Racemose inflorescence shows monopodial and indeterminate growth.