In botany, a spadix (// SPAY-diks; plural spadices // SPAY-dih-seez, // spay-DY-seez) is a type of spike inflorescence having small flowers borne on a fleshy stem. Spadices are typical of the family Araceae, the arums or aroids. The spadix is typically surrounded by a leaf-like curved bract known as a spathe. For example, the "flower" of the well known Anthurium spp. is a typical spadix with a large colorful spathe.
Monoecious aroids have unisexual male and female flowers on the same individual and the spadix is usually organized with female flowers towards the bottom and male flowers towards the top. Typically, the stigmas are no longer receptive when pollen is released which prevents self-fertilization. We also have Compound Spadix Inflorescence in which the axis is branched. Usually whole Inflorescence is covered by a stiff boat shaped path for example- Coconut.
Elephant ear or ape flower (Xanthosoma sagittifolium) with a white spadix partially surrounded by a green-, rose-, and cream-colored spathe
Spadix of Spathiphyllum floribundum
Spadix of Spathiphyllum in Brazil.
Spadix of Typha latifolia
Spadix of Zantedeschia elliottiana cultivar showing male flowers above with pollen and female below
Peace lily (Spathiphyllum cochlearispathum) clearly showing the characteristic spadix and spathe of the genus