Concept art is a form of illustration and it usually represents the illusion of what the real thing would look like. There are not a lot of details and it is most used as a design, idea or to produce a mood of the surroundings in video games, films, animation, or comic books before it is put into the final product.
Cove Tree motive is from a game called Subnautica:
The Giant Cove Tree consists of a large main trunk, brown in color that splits off into many smaller, bio-luminescent fuchsia tipped branches. Most of these branches surround a huge transparent egg, along with two similar, yet smaller egg-like structures found lower down on the tree. The lower portion of the tree consists of many large roots, dropping down into the surrounding brine pool. The egg consists of a transparent, blue tinged membrane and a glowing blue 'embryo' within. (source)
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Cheers,
VoodooLizard
