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Black-eyed pea

Black-eyed pea is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Black-eyed pea rather than just read about it. In short: The black-eyed pea or black-eyed bean is a legume grown around the world for its medium-sized, edible bean. It is a subspecies of the cowpea, an Old World plant domesticated in Africa, and is sometimes simply called a cowpea.

Black-eyed pea — main illustration
Black-eyed pea — illustration

Key takeaways

  • Black-eyed pea belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Black-eyed pea to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Black-eyed pea from memory before moving on to harder problems.

Reference excerpt

The black-eyed pea or black-eyed bean is a legume grown around the world for its medium-sized, edible bean. It is a subspecies of the cowpea, an Old World plant domesticated in Africa, and is sometimes simply called a cowpea. The common commercial variety is called the California Blackeye; it is pale-colored with a prominent black spot. The American South has countless varieties, many of them heirloom, that vary in size from the small lady peas to very large ones. The color of the eye may be black, brown, red, pink, or green. All the peas are green when freshly shelled and brown or buff when dried. A popular variation of the black-eyed pea is the purple hull pea or mud-in-your-eye pea; it is usually green with a prominent purple or pink spot. The currently accepted botanical name for the black-eyed pea is Vigna unguiculata subsp. unguiculata, although previously it was classified in the genus Phaseolus. Vigna unguiculata subsp. dekindtiana is the wild relative and Vigna unguiculata subsp. sesquipedalis is the related asparagus bean. Other beans of somewhat similar appearance, such as the frijol ojo de cabra (goat's-eye bean) of northern Mexico, are sometimes incorrectly called black-eyed peas, and vice versa.

History

The black-eyed pea originates from West Africa and has been cultivated in China and India since prehistoric times. It was grown in Virginia since the 17th century by African slaves who were brought to America along with the indigenous plants from their homelands. The crop would also eventually prove popular in Texas. The planting of crops of black-eyed peas was promoted by George Washington Carver because, as a legume, it adds nitrogen to the soil and has high nutritional value. Throughout the South, the black-eyed pea is still a widely used ingredient today in soul food and cuisines of the Southern United States. The black-eye pea is cultivated throughout the world.

Cultivation

In non-tropical climates, this heat-loving crop should be sown after all danger of frost has passed and the soil is warm. Seeds sown too early will rot before germination. Black-eyed peas are extremely drought tolerant, so excessive watering should be avoided. The crop is relatively free of pests and disease. Root-knot nematodes can be a problem, especially if crops are not rotated. As a nitrogen-fixing legume, fertilization can exclude nitrogen three weeks after germination. The blossom produces nectar plentifully, and large areas can be a source of honey. Because the bloom attracts a variety of pollinators, care must be taken in the application of insecticides to avoid label violations. After planting the pea, it should start to grow after 2–5 days.

Lucky New Year food

In African-American Hoodoo, eating black-eyed peas or Hoppin' John (a traditional soul food) on New Year's Day is thought to bring prosperity in the new year. The peas are typically cooked with a pork product for flavoring (such as bacon, fatback, ham bones, or hog jowls) and diced onion, and served with a hot chili sauce or a pepper-flavored vinegar. The traditional meal also includes cabbage, collard, turnip, or mustard greens, and ham. The peas, since they swell when cooked, symbolize prosperity; the greens symbolize money; the pork, because pigs root forward when foraging, represents positive motion. It is similar to the Ghanaian dish, waakye. Cornbread, which represents gold, also often accompanies this meal. Several legends exist as to the origin of this custom. Two popular explanations for the South's association with peas and good luck date back to the American Civil War. The first is associated with General William T. Sherman's march of the Union Army to the sea, during which they pillaged the Confederate food supplies. Stories say peas and salt pork were said to have been left untouched, because of the belief that they were animal food unfit for human consumption. Southerners considered themselves lucky to be left with some supplies to help them survive the winter, and black-eyed peas evolved into a representation of good luck. One challenge to this legend is that General Sherman brought backup supplies with him including three days of animal feed and would have been unlikely to have left even animal feed untouched. In addition, the dates of the first average frost for Atlanta and Savannah, respectively, are November 13 and November 28. As Sherman's march was from November 15 to December 21, 1864, it is improbable, although possible, that the Union Army would have come across standing fields of black-eyed peas as relayed in most versions of the legend. In another Southern tradition, black-eyed peas were a symbol of emancipation for African-Americans who had previously been enslaved, and who after the Civil War were officially freed on New Year's Day. Other Southern American traditions point to Jews of Ashkenazi and Sephardic ancestry in Southern cities and plantations eating the peas.

Culinary uses worldwide

Africa and the Middle East In Egypt, black-eyed peas are called lobia. When cooked with onions, garlic, meat and tomato juice, and served with Egyptian rice with some pastina called shaerya mixed in, they make the most famous rice dish in Egypt. In Jordan, Lebanon, and Syria, lobya or green black-eyed beans are cooked with onion, garlic, tomatoes, peeled and chopped, olive oil, salt and black pepper. In Nigeria and Ghana within West Africa and the Caribbean, a traditional dish called akara or koose comprises mashed black-eyed peas with added salt, onions and/or peppers. The mixture is then fried. In Nigeria a pudding called 'moin-moin' is made from ground and mixed peas with seasoning as well as some plant proteins before it is steamed. This is served with various carbohydrate-rich foods such as pap, rice or garri. It is also use to make waakye (a Ghanaian rice and beans meal).

South Asia

… excerpt ends here. Continue reading the full article.

Illustrations

Black-eyed pea illustration
Black-eyed pea: Ripe, opened black-eyed pea in pod and developing pods
Ripe, opened black-eyed pea in pod and developing pods
Black-eyed pea: Black-eyed peas, in and out of the shell
Black-eyed peas, in and out of the shell
Black-eyed pea: New Year's Day in Alabama: black-eyed peas, ham hock, and pepper sauce
New Year's Day in Alabama: black-eyed peas, ham hock, and pepper sauce
Black-eyed pea: Lobia curry, a black-eyed peas dish from India
Lobia curry, a black-eyed peas dish from India

Worked examples

Example 1 — a first encounter with Black-eyed pea

Start with the simplest possible case. Write down what Black-eyed pea claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Black-eyed pea before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Black-eyed pea ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Black-eyed pea

In research
Black-eyed pea appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Black-eyed pea in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Black-eyed pea is common in secondary-school and first-year university syllabi. It links to neighbouring topics African cuisine, Crops originating from Africa, Crops originating from Asia, so understanding it makes those chapters shorter.
In everyday life
Look for Black-eyed pea outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Black-eyed pea in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Black-eyed pea means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Black-eyed pea out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Black-eyed pea in simple terms?

The black-eyed pea or black-eyed bean is a legume grown around the world for its medium-sized, edible bean. It is a subspecies of the cowpea, an Old World plant domesticated in Africa, and is sometimes simply called a cowpea.

Why does Black-eyed pea matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Black-eyed pea?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Black-eyed pea.

Tags

  • African cuisine
  • Crops originating from Africa
  • Crops originating from Asia
  • Cuisine of the Southern United States
  • Edible legumes
  • Holiday foods
  • Plant subspecies
  • Soul food
  • Vigna

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