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Key lime

life science Maturity 5-7 Next article →

The Key lime is a small and very sour fruit.

A tree full of key limes in West Bengal, India
A tree full of key limes in West Bengal, India

It is also called the West Indian or Mexican lime. This fruit is famous for its strong smell and juicy pulp. Many people love it for making Key lime pie. This dessert is a big part of the culture in the Florida Keys.

Dayap or Philippine keylime
Dayap or Philippine keylime

The fruit is different from the larger Persian lime. Key limes have a much thinner skin. They are also more acidic and have more seeds.

Growing these trees requires careful work. The Key lime grows on a shrubby tree with many thorns. These trees have leaves that look like orange leaves.

keylime-flower
keylime-flower

Small, yellowish-white flowers grow on the branches. These flowers often have a light purple edge. It takes about nine months for a flower to become a fruit. Most fruit appears between May and September in the Northern Hemisphere.

KeyLime 2010 07 25 0001
KeyLime 2010 07 25 0001

Farmers often pick the fruit while it is still green. It will turn yellow once it is fully ripe.

History shows how the lime traveled the world. The plant is native to Southeast Asia. It likely moved through the Middle East to North Africa. From there, it went to places like Sicily and Spain. Spanish explorers eventually brought it to the West Indies.

Map of inferred original wild ranges of the main Citrus cultivars, and selected relevant wild taxa (Fuller et al., 2017)
Map of inferred original wild ranges of the main Citrus cultivars, and selected relevant wild taxa (Fuller et al., 2017)

A man named Henry Perrine is credited with bringing them to Florida. In the late 1800s, these limes were very important in California. In Florida, they became a beloved crop after a big freeze in 1894.

There are many interesting facts about how they grow. A tree grown from a seed can take 4 to 8 years to fruit. However, trees grown from cuttings can produce fruit in just one year. The fruit is usually between 3 and 6 centimeters wide.

Starr 080610-8303 Citrus aurantiifolia
Starr 080610-8303 Citrus aurantiifolia

Farmers must keep the seeds moist so they can grow. If the seeds dry out, they will not sprout. In the Middle East, people make a condiment called black lime. They do this by boiling the fruit in brine and drying it.

Key limes are part of a big family of citrus plants. They actually started as a natural hybrid. This means they came from two different plants. One parent was a wild papeda and the other was a citron. The Key lime has even helped create other types of limes. For example, the Persian lime came from a cross between a Key lime and a lemon. This shows how one small fruit can lead to many new varieties.

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🖼️ Images & Media (6)
File:A tree full of key limes in West Bengal, India.jpg
A tree full of key limes in West Bengal, India.jpg
File:Map of inferred original wild ranges of the main Citrus cultivars, and selected relevant wild taxa (Fuller et al., 2017).png
Map of inferred original wild ranges of...
File:Dayap or Philippine keylime.jpg
Dayap or Philippine keylime.jpg
File:keylime-flower.jpg
keylime-flower.jpg
File:KeyLime 2010 07 25 0001.jpg
KeyLime 2010 07 25 0001.jpg
File:Starr 080610-8303 Citrus aurantiifolia.jpg
Starr 080610-8303 Citrus aurantiifolia.jpg
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