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What toxic plant feeds 500 million people?

By Chelsie Vandaveer

October 16, 2001

killerPlants Tendrils: ~~1~~2~~3~~4~~5~~

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Suggested Reading—>Click here.

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Killer Picks: Wollemi Pine, greatest living fossils discovered in the 20th century—>Click here.

World Hemispheres Map, Audubon Bird Prints—>Click here.

Kenyan Giraffe Sculpture, Ship's Deck Maritime Prism, Wool U.S. Navy Peacoat—>Click here.

The cassava plant (Manihot esculenta Crantz) [man' i hot es' cue lent' ah] does not look like a food crop and without proper preparation, it isn't. It contains two cyanogenic glycosides, sugar complexes that release hydrogen cyanide upon ingestion.

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Collared Lory Feeding on Cassava Fruits

The cassava plant does not look like a food crop
and without proper preparation, it isn't.
Collared Lory Feeding on Cassava Fruits Photographic Print by  Tim Laman
Buy Photographic Print at AllPosters.com

Cassava or manioc has been cultivated or, at least, gathered and used as a flour starch for more than 3,000 years. All the varieties of cassava now in existence appear to be cultigens (generated under cultivation). Botanists have been unable to find the true wild species.

The Amazon basin was probably home to cassava and where its cultivation began. Cassava cultivation spread throughout the American tropics. Native groups as diverse as the Maya of Central America and the Taino of Hispaniola grew varieties best suited to their particular climates. By 1558, cassava was introduced to Africa by the Portuguese. Cassava and the potato were foods that became part of the horrendous slave trade.

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Indian Women Preparing Manioc Root, Engraved by Theodore De Bry (1528-98), from "Americae," 1593

Native groups as diverse as the Maya of Central America and the Taino
of Hispaniola grew varieties best suited to their particular climates.
Indian Women Preparing Manioc Root, Engraved by Theodore De Bry
(1528-98), from "Americae," 1593 Giclee Print
 by  Jacques Le Moyne
Buy Giclee Print at AllPosters.com

Cassava is the major source of carbohydrates for 500 million people living in the tropics. In Africa, it provides an average of 37 percent of the total calories consumed. It does not require farm machinery or massive amounts of labor, water, and fertilizers to grow. It is a plant seldom affected by plagues of grasshoppers. But cassava is a subsistence crop raised mostly by women with children to feed.

Cassava does not keep and must be processed within days of being dug. Commercial farms are usually located close to factories where the starch can be extracted and shipped. Although a staple of the tropics, in the Northern Hemisphere, cassava is only used for tapioca, farinha, and laundry starch.


To learn more about cassava and to view a photograph of the plant, click on the University of Guam website:

http://www.uog.edu/cals/site/POG/manihot.html

 

killerPlants Tendrils: ~~1~~2~~3~~4~~5~~

 

Suggested Reading:

What twelve plants supply most of the food...? Plants that Changed History - Aug 21, 2001
Why should potatoes be stored in the dark? Herbal Folklore - October 8, 2001
What slave food is more valuable than Inca gold? Plants that Changed History - October 9, 2001
What is a hairy potato? Renfield's Garden - October 10, 2001
What is so odd about the color of the petunia? Weird Plants - October 11, 2001
What was the great Potato War? What's in a Name? - October 12, 2001
What common food plant was used for hunting? Herbal Folklore - October 15, 2001
What plant was blamed for the deaths of children? Herbal Folklore - October 22, 2001
What Ice Age morning glory feeds millions of people? Plants that Changed History - Oct 23, 2001
How do sweet potatoes protect themselves? Renfielsd's Garden - October 24, 2001
Of witches, werewolves, and UFOs Herbal Folklore - October 29, 2001
Why is the banana like a mule? Weird Plants - November 29, 2001
What canna is edible? Weird Plants - September 19, 2002

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Gurney's Seed and Nursery -$20 off—>Click here.

Henry Fields Seed and Nursery -$20 off—>Click here.

Spring Hill Nursery -$20 off—>Click here.

Gardens Alive! -$20 off—>Click here.

Michigan Bulb -$20 off—>Click here.

 

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National Geographic's Store has great gift ideas.
    

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National Geographic®

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We have brought back this classic view of the world with updated, modern cartography and an elegant earth-tone color palette for a new, yet fashionably retro, view of the world.  Click here.

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Framed Audubon Bird Prints

National Geographic®

John James Audubon (1785–1851) remains this country's most well known ornithological artist. He meticulously and realistically depicted thousands of bird species, many of which are gathered in his monumental volume, Birds of North America. These reproductions of original Audubon watercolors from the collection of the New-York Historical Society—the single largest repository of Audubon's work—are presented in dark-wood molding behind glass with acid-free archival mats.

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Kenyan Giraffe Sculpture

National Geographic®

For the Kisii community of southwestern Kenya, rare giraffe sightings inspire great excitement. Giraffes are encouraged to remain within the village lands because the Kisii believe that their great height allows them to see approaching good and bad omens. Hand-carved from soapstone, this giraffe family is made in the hopes that Kisii ancestors will bring the appearance of these revered animals.

Crafted by artisans, each handmade sculpture is unique; please accept slight variations.
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Ship's Deck Maritime Prism

National Geographic®

Visitors to the U.S.S. Constitution often wonder what purpose is served by the glass tiles that are flush with Old Ironsides' deck. Before electricity, kerosene lamps and candles brought light, and the risk of fire, below deck. Glass prisms laid into the ship's deck helped reflect sunlight into the spaces below without weakening the planks.

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National Geographic's Store has great gift ideas.
    

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National Geographic®

For more than 200 years the double-breasted wool peacoat has been standard issue in many cold-weather navies, becoming part of the U.S. Navy uniform in the early 20th century. Looking back through more than a century of old photographs from Europe and the U.S. will show you that the style and function of the jacket has changed very little over time, a true testament to its seaworthiness and warmth.

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Wollemi Pine

National Geographic®

Exclusively from National Geographic, this survivor from the age of the dinosaurs is one of the greatest living fossils discovered in the 20th century. The Wollemi pine is one of the world's oldest and rarest tree species, belonging to a 200-million-year-old plant family thought to have been extinct for more than two million years.

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Comes with a care manual with the full story about the discovery and fascinating history of the Wollemi pine. Comes in a copper-colored container and will be approximately 10''H when shipped. A portion of the proceeds from the sale of these plants will fund ongoing conservation research.  Click here.


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