Having or existing in various forms; exhibiting polymorphism.

The male microgametophyte of seed plants, containing the cells that produce sperm.

A compact grouping of pollen grains, often found in orchids and milkweeds.

The part of the anther that contains and releases pollen.

A structure in orchids and milkweeds containing pollen masses, stalks, and adhesive discs.

The complete pollen delivery unit in certain flowers, including pollinia and their attachments.

The act of transferring pollen to enable fertilization in plants.

Coherent masses of pollen grains, typically found in orchids and some other families.

A mass of pollen grains transferred as a unit during pollination in certain plants.

A single cohesive mass of pollen that is characteristic of orchids and milkweeds.