Phaseolus vulgaris

The common bean is a plant.

It grows in long pods. Some beans grow on vines. Other beans grow on bushes.

These plants have green or purple leaves. The leaves have three small parts. They also have small flowers. These flowers turn into pods.

Inside the pods are the beans.

The beans can be many colors. Some are black or white. Some have spots.

Raw beans can make you sick. You must boil them for 30 minutes. This makes them safe to eat.

Many people around the world eat beans. India grows many of them.

They are a very tasty food.

The common bean is a plant that grows in pods.

It belongs to the legume family. Some beans grow on tall vines. Other beans grow on short bushes. All wild beans like to climb.

The leaves are green or purple. Each leaf has three small parts. The flowers are small and white or pink. These flowers turn into pods.

The pods hold four to eight beans. These beans come in many colors. Some are plain and some have spots.

Common beans are a very important food. In 2022, people grew 28 million tonnes of them. India grew the most beans in the world.

You must be careful with raw beans. They have a toxic protein called phytohaemagglutinin. This can make you sick. You can make them safe by boiling them for 30 minutes. People eat the beans, the green pods, and even the leaves. Some beans can stay good for five years.

The common bean is a very important plant for people around the world.

It belongs to the legume family, which is called Fabaceae. These plants can grow as short bushes or long, climbing vines.

Many people use the beans for food, but they also eat the green pods. Sometimes, people even use the leaves as vegetables or the straw as animal food. In 2022, the world produced 28 million tonnes of dry common beans. India was the leader in this production, growing 23% of the total amount.

Watching a bean plant grow is a fascinating way to see nature work.

First, the plant grows green or purple leaves. Each leaf is divided into three smooth, oval parts. Then, small flowers about one centimeter long appear. These flowers are white, pink, or purple and have ten stamens. The flowers are self-pollinating, which helps the plant grow stable types.

After the flowers, pods grow that are 1 to 1.5 centimeters wide. These pods can be green, yellow, black, or purple. Inside each pod, you will find between 4 and 8 beans.

Humans have been growing these beans for a very long time.

Archaeologists found large beans in the highlands of Peru from 2300 BC. Small beans were found in Mexico around 300 BC. These beans were domesticated in two different areas: Mesoamerica and the southern Andes. In the Americas, beans were part of the "Three Sisters" with squash and corn. This helped indigenous people grow food together. Later, the beans traveled to Europe during the Columbian exchange.

There are many different types of beans to discover.

Some beans, like the kidney bean, are shaped like the organs in your body. Others, like the Anasazi bean, have beautiful red and white patterns. The pinto bean is very common in the United States and Mexico. You might also see the black turtle bean, which is popular in Latin American cooking.

Some beans are even named after animals, like the Jacob's cattle variety. Each type has its own special color, shape, and flavor.

Even though beans are delicious, you must prepare them carefully.

Raw dry beans contain a toxic protein called phytohaemagglutinin. This protein can make you sick if you eat it. To make the beans safe, you must boil them for 30 minutes. This heat deactivates the toxin so you can eat them safely. It is just like how we cook other foods to make them ready to eat. Once cooked, these beans can be a healthy part of many meals.

The common bean, known scientifically as Phaseolus vulgaris, is a herbaceous annual plant. It is a vital member of the Fabaceae family, which is the legume family. These plants are incredibly important to global food systems. In 2022 alone, the world produced 28 million tonnes of dry common beans. India led this massive global production, accounting for 23% of the total amount.

Understanding how these plants grow involves looking at their unique biology. The plant produces green or purple leaves. Each leaf is divided into three smooth, oval leaflets. The flowers are small, measuring about one centimeter in length. They can appear in white, pink, or purple colors. Each flower contains 10 stamens. Because these flowers are self-pollinating, the plant can easily create stable cultivars.

After pollination, the plant develops seed pods. These pods are typically 1 to 1.5 centimeters wide. They can be many colors, including green, yellow, black, or purple. Each pod contains between 4 and 8 individual beans. The beans themselves are often kidney-shaped and up to 1.5 cm long. They can be smooth or mottled with two or more colors. Some varieties even grow a string along the pod.

There are two main growth styles for these plants. Bush varieties grow as erect, upright bushes. Pole varieties, also called running varieties, grow as long vines. All wild members of the species have a climbing habit. Cultivars are classified based on these different styles of growth.

History shows that humans have worked with these plants for millennia. Archaeologists found large-seeded varieties in the Peruvian highlands dating to 2300 BC. These seeds spread to coastal regions by 500 BC. In Mexico, small-seeded varieties appeared around 300 BC. These later spread north and east of the Mississippi River by 1000 AD. The species was domesticated in two distinct areas: Mesoamerica and the southern Andes. This created two separate genetic pools.

In the Americas, the common bean was part of the "Three Sisters." This was a system of growing beans, squash, and maize together. This method was central to indigenous American agriculture. The beans eventually reached Europe during the Columbian Exchange in the 16th century. Before this, Europeans grew different beans from Asia. Those Asian species were later moved to other genera like Vigna or Vicia.

There is a wide variety of specific bean types to explore. The Black Turtle bean is popular in Latin American cuisine. The Kidney bean is named for its resemblance to a human organ. The Anasazi bean is a dappled red and white variety. The Flageolet bean is picked before it is fully mature. Some beans, like the Calypso, are also known as panda beans.

Science also explains how these plants survive and how we must eat them. Most legumes acquire nitrogen through an association with rhizobia. These are nitrogen-fixing bacteria that help the plant. However, raw dry beans contain a toxic compound called phytohaemagglutinin. This protein can be dangerous if eaten uncooked. You can deactivate this toxin by boiling the beans for 30 minutes.

Finally, the genetics of the plant are quite interesting. The genome of Phaseolus vulgaris has 11 chromosomal pairs. This means the total number of chromosomes is 22. Its genome is one of the smallest in the legume family. It measures 625 Mbp per haploid genome. These beans are hardy and can maintain germination capacity for up to five years.