Spadix

Spadix is a type of inflorescence found in certain plant species. It is characterized by a thick, fleshy axis enclosed by a spathe, a large, often colorful bract. The spadix is typically densely packed with flowers.

Structure and Function

The spadix is a specialized inflorescence that serves to attract pollinators. The flowers on the spadix are often small and inconspicuous, but the spathe that surrounds them can be large and showy. In some species, the spadix produces heat and emits a strong odor to attract pollinators.

The structure of the spadix can vary depending on the species. In some plants, the spadix is a simple, unbranched structure, while in others it can be complex and highly branched. The flowers on the spadix are usually arranged in a spiral pattern.

Examples of Plants with Spadices

Many plants in the family Araceae, also known as the arum family, produce spadices. This includes species such as the titan arum (Amorphophallus titanum), which produces the largest unbranched inflorescence in the world, and the peace lily (Spathiphyllum), a popular houseplant.

Other examples of plants with spadices include the calla lily (Zantedeschia), the anthurium, and the jack-in-the-pulpit (Arisaema triphyllum).

Pollination

The spadix plays a crucial role in the pollination of the plants that produce it. The heat generated by the spadix helps to volatilize the odorous compounds that attract pollinators. In some species, the spadix also provides a platform for the pollinators to land on.

Once the pollinators are attracted to the spadix, they transfer pollen from the male flowers to the female flowers, facilitating fertilization and the production of seeds.

See Also

• Inflorescence
• Spathe
• Araceae
• Pollination