Question

Is sunflower an Inflorescence?

Answer 1

An indeterminate inflorescence could also be a raceme, panicle, spike, catkin, corymb, umbel, spadix, or head. During a raceme, a flower develops at the upper angle (axil) between the stem and branch of every leaf along an extended , unbranched axis.

Complete answer:
Yes, the sunflower is an inflorescence.
The term inflorescence refers to the arrangement of flowers on the floral axis.
On the idea of arrangement on the peduncle and flower timing, inflorescence is often classified into:
1. Racemose type.
2. Cyme type.
3. Special type.
The inflorescence of sunflowers may be a capitulum consisting of various florets arranged during a spiral pattern. The outer whorl of the florets is zygomorphic, ligulate and incomplete (ray florets), while the inner florets (disc florets) are actinomorphic, ligulate and complete.
The sunflower's flower is really an “inflorescence” because it's made from many individual flowers, arranged in such a way that they appear as if a standard flower with a radial array of petals.
Sunflower is an annual plant of Compositae with an outsized head (capitulum), which is the characteristic inflorescence of sunflowers. Depending upon the variability , the inflorescence may contain ray flowers, disk flowers or both. The ovary of every flower is situated below the attachment of the corolla and stamens, a condition mentioned as epigynous or inferior. This is often the most important family of flowering plants.

Note:
Racemose and cymose are two sorts of inflorescence, i.e. arrangement of flowers around the main axis. In racemose, the most axis continues to grow indefinitely and therefore the flowers are borne laterally. In cymose inflorescence, flowers are borne terminally on the floral axis and show determinate growth of the most axis.