Disk flowers cover the remainder of the head and are regular, symmetrical, and usually less showy. Heads may also have flowers which are all irregular with no differentiation into rays and disks. They are often found under umbels and heads. Cymose Inflorescences - Upward growth of the floral axis is stopped early by the development of a terminal flower. The floral axis ceases to elongate after the first flower opens, and is therefore a determinate inflorescence.
Examples are Plumeria spp.
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