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Amorphophallus paeoniifolius

Amorphophallus paeoniifolius, the Elephant Yam, belongs to the Aroid family, Araceae. This family contains many plants recognised as having horticultural appeal such as the Arum Lilies, Monstera, Syngonium and Philodendron. The family is characterised by its inflorescence, consisting of a fleshy spike of small flowers (spadix) usually subtended by a large bract (spathe).

Amorphophallus paeoniifolius, the Elephant foot yam or Whitespot giant arum or Stink lily, is a tropical tuber crop that offers excellent scope for adoption in the tropical countries as a cash crop due to its production potential and popularity as a vegetable in various delicious cuisines.

Elephant foot yam is basically a crop of Southeast Asian origin. It grows in wild form in the Sri Lanka, Philippines, Malaysia, Indonesia, and other Southeast Asian countries. In India it is grown mostly in West Bengal, Kerala, Andhra Pradesh, Maharashtra and Orissa. In India it is popularly known as suran or jimikand in Hindi, senai kizhangu in Tamil, suvarna gedde in Kannada, ol in Bengali, chena (ചേന) in Malayalam, oluo in Oriya, and kanda gadda in Telugu.

However, in Tonga, teve was seen as the most inferior of all yam species, only to be eaten if really nothing else was available.

Distribution mapAmorphophallus paeoniifolius occurs through the tropics, from India to New Guinea and to Australia where it is found in tropical Queensland and Northern Territory in seasonally dry areas. The species was previously called Amorphophallus campanulatus.

This plant produces a single inflorescence followed by a solitary leaf. The plant is deciduous, dying back to a large underground corm, weighing up to 8kg, after the growing season.

Some people regard the inflorescence as bizarre. It comprises a large spadix crowned with a bulbous purple knob, encircled by a fleshy purple and green-blotched spathe up to 50cm wide. On successful pollination of the female flowers the spadix can extend to 2m tall. The fresh inflorescence emits an odor reminiscent of rotting flesh to attract pollinating carrion flies and beetles.

The solitary leaf resembles a small tree. The leaf blade is much divided into hundreds of leaflets and can reach over 1m wide. This blade sits atop a thick fleshy stem up to 13cm diameter and 2m tall. The pustular surface of the stem is attractively blotched with paler shades of green.

Amorphophallus paeoniifolius is quite hardy in tropical areas when planted in rich, well-drained soil in a sheltered, humid position. In temperate areas the plant can be grown successfully as a container specimen. A pot twice the diameter of the corm should be selected and filled with rich, well-drained potting mix.

The corm needs to be planted well below the soil surface to give the plant stability. Ample water is required during the growing season but the amount can be reduced dramatically during dormancy. Corms of potted specimens can be removed from the pot and stored dry to prevent frost damage. The occasional application of a high phosphorus fertilizer (NPK 15,30,15) will ensure maximum growth and health of the plant.

The plant can be propagated from offsets of the corm or by fresh seed sown in a slightly acidic seed raising mix. As most of the starch stored in the corm is used to produce the leaf, transplanting should not be attempted until the leaf has wilted and the new corm developed.

The corms of some varieties are edible and grown as food crops in several Asian countries, especially Indonesia.

The main horticultural pests affecting Amorphophallus paeoniifolius is nematodes.

Name meaning:

Amorphophallus - Deformed or shapeless penis.
paeoniifolius - Peony-like foliage.

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