At the base of the 1.5 cm corolla tube are four stamens - one short and one long pair.

At the center are six short stamens.

A long style, with six medium and six short stamens.

There are four stamens, two long and two short.

The sunflower's pollen is carried on short stamens, hundreds of them, covering the central disk.

The three short stamens are located at the bases of the sepals.

The center of the flower has a long pistil and several shorter stamens with large anthers.

Flowers have a tetradynamous androecium, with four long and two short stamens.

The stigma protrudes from the corolla and is surrounded by shorter stamens.

Now the pollen of this one occasional short stamen, I think, very likely would produce dwarf plants.