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Diagram of spadix. In botany, a spadix (/ ˈ s p eɪ d ɪ k s / SPAY-diks; pl.: spadices / ˈ s p eɪ d ɪ s iː z / SPAY-dih-seez, / s p eɪ ˈ d aɪ s iː z / spay-DY-seez) is a type of inflorescence having small flowers borne on a fleshy stem. Spadices are typical of the family Araceae, the arums or aroids.
The Araceae are a family of monocotyledonous flowering plants in which flowers are borne on a type of inflorescence called a spadix. The spadix is usually accompanied by, and sometimes partially enclosed in, a spathe (or leaf-like bract). Also known as the arum family, members are often colloquially known as aroids.
Compound inflorescences are composed of branched stems and can involve complicated arrangements that are difficult to trace back to the main branch. A kind of compound inflorescence is the double inflorescence, in which the basic structure is repeated in the place of single florets. For example, a double raceme is a raceme in which the single ...
The inflorescence is a spadix or spike surrounded by one or more bracts or spathes that become woody at maturity. The flowers are generally small and white, radially symmetric, and can be either uni- or bisexual. The sepals and petals usually number three each and may be distinct or joined at the base.
The flowers are inconspicuously crowded on the spadix. The spathes act as the conspicuous portion of the plant. The inflorescence differs in size and the amount of flowers it contains. [7] Due mostly to the crowding effect, the flowers do not show three (or its multiple) floral parts, as should be expected for monocots, but four perianth parts.
This is an example of dichogamy, a rare phenomenon in flowering plants. Due to this sex-change lifecycle, this species is sometimes called colloquially as Jack or Jill in the pulpit [8] [9] [10] or Jill-in-the-pulpit. [11] [12] The unripe fruits are smooth, shiny green berries (each 1 cm wide) clustered around the thickened spadix.
Amorphophallus (from Ancient Greek amorphos, "without form, misshapen" + phallos, "penis", referring to the shape of the prominent spadix) is a large genus of some 200 tropical and subtropical tuberous herbaceous plants from the Arum family (), native to Asia, Africa, Australia and various oceanic islands.
Inflorescence of Zantedeschia aethiopica, showing the white spathe surrounding the central, yellow spadix. Inflorescence: Takes the form of a solitary pseudanthium (false flower), with a showy white or yellow spathe (a specialised petal like bract) shaped like a funnel with a yellow, central, finger-like spadix, which carries the true flowers ...