Ubi refers to
any edible plant root : ubi kayu, ubi keledek, ubi keladi, ubi kentang, sengkuang dll. Even though all the ubi sharing the same epiphyte, they came from different part of the
world, and of different family and genus of plant.
Despite all the differences, all the ubi contain lots of starch. The starch is actually polysaccharide ( polymeric
carbohydrate ), when cooked, breaks down
into simple carbohydrate ( glucose, fructose and galactose ). This explains
why the cooked ubi are sweet in flavor.
Here are some, which are quite rare, maybe
even alien to some, especially for those privileged one whom never had worry
what to cook for lunch &/@ dinner.
Kudzu / 粉葛
( Puereria lobata var thomsonii )
Kudzu is the general name for plants
in the genus Pueraria. It is originated from East Asia.
The root is usually used in Chinese
stew soups, which enhance the ‘sweetness’ of the soup. Kudzu starch, which is extracted from
the root is used as food ingredient.
Sengkuang / Jicama / 沙葛
（ Pachyrhizus erosus ）
Sengkuang is
from Mexico. It is first brought by the
Spaniard to the Phillippines, where it is called singkamas.
Sengkuang is usually consumed fresh,
an ingredient in rojak. It can be cooked, or used as a main
ingredient in popiah.
Chinese Yam / Nagaimo / 山药
（ Dioscorea oppositifolia）
As the name suggested, Chinese Yam is
originated from China. Chinese Yam was Introduced
to Japan in the 17th century and Europe during the 19th
century European Potato Failure.
The tuber is cylindrical in shape,
capable to grow up to 1 meter in length.
When cut or peeled, it exude slimy,
slippery substance.
In Japan, 3 groups are recognized :
• Nagaimo ( 長芋 ) - long, cylindrical type ;
• Ichōimo ( 銀杏芋 ) - flat, palmate
shaped type ;
• Tsukune imo (ね芋) - round shaped type.
Chinese Yam is can be consumed raw,
or cooked. Also used extensively in
Traditional Chinese Medicine.
Beet / 甜菜头
（ Beta vulgaris vulgaris）
The beetroot is the taproot of a beet
plant. Beets were domesticated since the
ancient Middle East. During the 19th
century, wine often was coloured with beetroot juice.
Beetroot can be eaten boiled, roasted
or raw, pickled
Beetroot contain lots of
betanin. Betanin is not broken down in
the body, and may cause colour of stool or urine to be reddish in colour.
Kelaldi / 芋头
（ Colocasia esculenta）
Keladi is originated from the Old
World tropics. It was believed that it
was one of the earliest cultivated plants.
It is not rocket science that a keladi’s
corm is edible, but many are not aware that the leaves are also edible.
Keladi contains calcium oxalate, which is toxin if consume raw. The toxic can be destroy via cooking, or by
steeping in cold water overnight.
Yacón / 雪莲果
（ Smallanthus sonchifolius）
Yacón is originated from the Andes of
South America. In the 1990s, it was
introduced to Japan, and from there to other Asian countries.
It is crisp, sweet, and fragrant, almost
similar to jicama.
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