Iva xanthiifolia
False Ragweed

Flower Head Top, Florets Spread Out


Some of the florets have been spread out to reveal their base.

The flower head is composed of functionally staminate florets in the centre and a few pistillate florets on the periphery.  The functionally staminate florets contain pollen producing stamens and an unbranched, sterile style.  The pistillate florets posses no stamens, an ovary, and a two-cleft style. Upon maturity the pistillate florets produce the only fruit (achenes) in the head.