Arums
While the Titan Arum isn't much eaten, corms (swollen underground stems)
of some far less spectacular arums are important in the diet of many tropical
peoples.
Titan Arum image U.S. Government - public domain.
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General & HistoryThe Arums are a large enough family and common as ornamentals, but only a few members are significant as food. Taro has been spread by Polynesian settlers throughout the Pacific Islands and as far as Hawaii. It has long been an important food for these peoples because it is one of the few starchy vegetables that thrive in a hot and very wet environment. Caution: Arums foliage and some roots typically contain large amounts of sharp pointed Calcium Oxalate crystals that cause severe irritation and swelling of the mouth and throat which can be fatal through strangulation. Should you manage to swallow them, they break down into Calcium and corrosive Oxalic Acid in the digestive tract causing severe gastric distress. It is important that all Arums be properly prepared and cooked before ingestion. VarietiesElephant Foot Yam - [Suran (India),
Amorphophallus paeoniifolius]
Jack-in-the-Pulpit - [Indian turnip,
A. triphyllum]
Malanga - [Yautia (Puerto Rico),
Malanga (Cuba), Mangarito (Brazil), New Cocoyam (Africa), Tannia / Tannier (Caribbean), Macabo,
Taioba (Brazil, leaves only),
'Ape (Polynesia), Xanthosoma saggitifolium (malanga blanca) ,
X. atrovirens (malanga amarilla), X. violaceum (malanga lila),
X. maffaffa (mangarito)]
The corm is
somewhat mucilaginous and cooks to a smoother texture than potato, with
chunks holding their shape well. The longer of the photo specimens, obtained
from a market serving a mixed Russian / Mexican community, was 8-1/2 inches
long, 2-5/8 inches in diameter at the thickest part, and weighed 14 ounces.
Skunk Cabbage - [Symplocarpus
foetidus]
Sweet Flag - [Acorus americanus,
Acorus calamus (Eurasian species)]
Sweet Flag was long used as a food flavoring and in perfumes, but the FDA banned all varieties from food when one variety in India was found to contain a carcinogen, even though the varieties found here don't contain that substance. In areas where Sweet Flag grows leaves are sometimes placed in jars of sugar as a flavoring substitute for vanilla bean. Leaves are used for their fragrance and to repel weevils from stored grains. The root is used medicinally. Geneticists now consider Sweet Flag separate from the Arums but a precursor
of the type, thus I'm listing it here without apology. Fossils have been
found from the Eocene, about 50 million years ago. Illustration
Prof. Dr. Otto Wilhelm Thomé, 1885.
Taro - [Taro (Polynesian);
Kalo (Hawaiian); Colocasia (Rome); Kolocasi (Cyprus); Ocumo, Cocoyam,
Madumbi, Nduma (Africa); Macabo (Cameroon); Khoai mo, khoai so (Vietnam);
Laing (Philippine); Dasheen, Eddoes (Caribbean); Malanga cabeza, Malanga
islena (Cuba); Arvi, Colocasia (India); Talas (S.E. Asia); Dalo (Fiji);
Cara (Brazil); Calaloo (Caribbean, leaves only); Yautia (Puerto Rico);
Colocasia esculenta]
Taro corms (called taro root) are short underground stems rich in starch. Unlike most starchy vegetables they are high in amylose, a starch soluble in hot water and contain 3% sugar which makes them somewhat sweet. Taro is indigestible raw and can cause severe gastrointestinal distress if not properly prepared and cooked. In India taro corms and stems are called for in some curries as colocasia root and colocasia stems. In some areas the leaves are also cooked and rarely the flowers. In Hawaii corms are used to make poi. The photo specimens include regular taro corms available everywhere and
a giant taro corm often available from markets serving a Southeast Asian
community. The regular run around 3-3/4 inch long, 2-1/4 inch diameter and
about 5 ounces. The giant in the photo is 8 inches long, 4 inches in
diameter and weighed a little over 2-1/2 pounds, but they get quite a bit
bigger. Details and
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