Everyone has violets and dandelions in their yard, and anyone can grow beautiful roses to look at and enjoy. But there are some flowers that are valued, not because they are nice to look at, but because they are extremely rare. Here are the top five rarest flowers in the world, some of which only have one or two remaining specimens left.

The degree of rarity for these flowers is debatable (in most cases it is impossible to know exactly how many specimens of a certain flower there are in existence), but what is not debatable is that they are all highly endangered and can't be found anywhere else in the world.

Chocolate cosmo

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No, this isn't an alcoholic beverage. The chocolate cosmo is a stunning, dark, reddish-brown flower native to Mexico. Sadly, this flower no longer grows naturally in the wild; it only exists now in gardens and greenhouses. The last natural occurrence of the chocolate cosmo was more than 100 years ago. After that, the flower has had to be propagated by taking pieces of tissue or roots from an already established chocolate cosmo plant in order to grow new ones.

Jade vine

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Jade vines can only be found in the Philippines, thanks to decades of deforestation and destruction of its other natural habitats. This enchanting flower is very pretty, with light blue or green petals that form claw-shaped flowers on a vine that could reach lengths of nearly 10 feet. To make this plant even more incredible, it takes on a "luminous quality" at night to lure in the bats that pollinate it.

Kadupul flower

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The Kadupul flower is also known as the Queen of the Night, because it only blooms after dark. When night falls and the stars come out, this cactus blossom opens up its big, white petals, but by the morning the flower has wilted and closed, almost as if it were never open at all. You can only find this rare flower in Sri Lanka, India, China, Japan, and a few places in South America, where it is surrounded by myths and legends.

Corpse flower

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Its name might sound hideous, but this unique flower is actually quite interesting to look at... although its scent is a whole other story. This flower, which is located in the lowlands of Indonesia, rarely blooms, but when it does, it puts out a sickening odor that is said to smell like rotting meat or, as the name suggests, a putrefying corpse. According to Live Science, it smells this way for a reason: the stinky smell is designed to help attract beetles, flies, and other meat-eating insects to come to the plant and help pollinate it.

Middlemist red camellia

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The Middlemist red camellia originated in China, but now only exists in two places: a greenhouse in London, England and a garden in New Zealand. In China, the flower was cultivated and shipped out to places around the world as a luxury item, but soon the flower disappeared from its home country. In 1804, a man named John Middlemist brought the flower to the United Kingdom, where it was cultivated once more. Now, only two examples of this pink (not red, as the name would suggest), rose-like flower remain, making it the rarest flower in existence.