What would Thanksgiving be like without the Sweet Potato, Ipomoea batatas? I couldn’t resist drawing one of ours
before we baked it for everyone at our table to enjoy today. Drawing it made me want to know more about
these funny shaped orange root veggies, so I tried to answer one big question
I’ve had for a long time: Are sweet
potatoes and yams the same? The answer is no.
The Yam, which is in the genus Dioscorea,
is an unrelated tuber native to Africa and now grown in the Caribbean and is
sold in mostly specialized markets. I
also found out that the Sweet Potato is not related to the standard potato, Solanum tuberosum nor is it in the
nightshade family as are potatoes, tomatoes, and eggplants. And here is a surprise: Sweet Potatoes are actually related to
the morning glory and the sweet potato vine grows easily with pretty leaves. Thinking about that, I remembered planting a
sweet potato in a jar with water and toothpicks in 2nd grade and
watching it develop roots and an amazing vine that seemed to grow a little
every day. I wish schools had been more
into drawing to learn science back then—what a fascinating record I would
have.
Sweet potatoes are among the most nutritious foods you can
find, and the more orange-fleshed they are the more beta-carotene they
contain. They also contain a high
content of Vitamins C, B5 and B6, and complex carbohydrates. Their cultivation is encouraged in countries
with poverty and poor child health. Researchers
have traced this wonderful food source to northwestern South America. Its domestication seems to have occurred with
the development of Tropical Forest agricultural villages around 2500 BCE. The Spanish introduced it to Europe and
spread it to China and Japan. The
Portuguese brought it to India, Indonesia, and Africa. Sweet potatoes have been radiocarbon-dated in
the Cook Islands to 1000 CE, so it is clear that they were in Polynesia long prior
to Magellan’s circling of the world between 1519-1522. One linguistic clue to these connections is
that Polynesian and Quechuan languages have a similar name for the plant. We were late in discovering that wonderful
food: the Sweet Potato was introduced to the United States in the 18th
century, and we’ve been growing and eating them ever since.
And as we know, they have the word “Sweet” right in their
name. What can say it better than that? They
are tasty, healthy, nutritious, and fun to cook and eat and draw. Happy Thanksgiving all!
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