Mother Nature is always the best fantasy creators. Have you ever imagined that earth has "tongues" sticking out from the ground to take in food? Well, there are a bunch of fungi having peculiar tongue-shaped heads. They mostly come from the Geoglossaceae family, and are generally known as earth tongues.  

Different from our pink tongues, earth tongue fungi are commonly black or yellow. For starters, there are several tips to distinguish different types of earth tongues. Mushrooms in the genus of Geoglossum and Trichoglossum are black, while fungi in the genus of Microglossum are olive green to brown. 

If you want to make a distinction between Geoglossum and Trichoglossum species, you might need the help of a hand lens. Trichoglossum species have a bristly stem and tiny "hairs" on the spore bearing surface, while Geoglossum species have a smooth surface. That's why Trichoglossum species are also called hairy earth tongues.

Earth tongues are cosmopolitan. They have been found in all continents except Antartica. If you want to find them in your home country, you can look closely at soil in moss beds or in grassy areas from the summer through the fall. In North America, they are commonly spotted in coniferous woodland and broad-leaved woodland, whereas in Europe they are seen in grasslands, particularly the waxcap grassland.

In Europe, nutrient-poor waxcap grasslands are in decline as a result of agricultural practices like ploughing, manuring and the use of fertilizers. These grasslands support a wide range of larger fungi, including earth tongues. Therefore, some earth tongue species are endangered and in need of urgent conservation. For example, Geoglossum simile is listed as threatened with extinction in Austria and Germany, critically endangered in Denmark, and vulnerable in the Netherlands. Their presence often indicates limited human disturbance.

About 'Alien Fungi'

What is the most ancient land-based life after bacteria? Fungi! An industrious decomposer in the natural world, fungi have existed for almost a billion years, at least 500 million years older than the first land plants. In the series "Alien Fungi," CGTN explores some peculiar-looking fungi with alien features and observes how they enjoy their eternal, cryptic lives on damp floors, decaying wood and hidden areas.

Read more:

Bleeding mushroom

Octopus stinkhorn: 'Octopus' in the woods

Turkey tail mushrooms: The medicinal 'swirling clouds'

Common puffball: The pear-shaped fungi that release gas

Stag's horn fungus

Dead man's fingers

Porcelain fungi: Glistening translucent beauties

Cup fungi: The little cups

Ink caps: The mushrooms with dripping ink

Coral mushroom: The corals of the land

Do you dare to eat these violet mushrooms?

Death cap: The deadly fungi with a harmless look

Fly agaric: The mushroom that inspired 'Alice in Wonderland' creators

Bioluminescent fungi: The mushrooms that glow in the dark

Bridal veil stinkhorn: A girlish mushroom that loves to wear 'skirt'

Bird's nest fungi: Dandelion-like drifting life

Barometer Earthstar: The fallen star praying for moisture

(All images via Getty)

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