Learn about this topic in these articles:

In Asteraceae: Pollination
…pollination known as plunger, or secondary, pollination. In this system the flowers are such that the stamens form a tube around the immature style, with their pollen surfaces facing inward. As the style elongates within the tube of anthers, it pushes the pollen out on specialized hairs located beneath the…
Read More
In Asterales
…a specialized mechanism known as plunger pollination.
Read More
In Asterales: Campanulaceae
…with an inferior ovary and plunger pollination mechanism. The fruits ripen in dry (capsule) or fleshy (berry) form, producing many small seeds. In bellflowers the flowers are bell-shaped and radially symmetrical (all petals alike in shape and size), and the anthers are separate, with the pollen held by hairs along…
Read More
In Asterales: Other families
…bilaterally symmetric flowers with a plunger pollination mechanism, and an inferior ovary. The corolla is often divided to the base on one side, and the petals have marginal wings that may make each look trilobed. Several herbaceous species of Scaevola are important ornamentals, especially as basket plants.
Read More