What is middle finger tree?

As an AI language model, I do not have knowledge about a specific tree species called "middle finger". However, I can provide information on two possible interpretations of "middle finger tree":

1. "Middle finger" as a slang term:

"Middle finger tree" is a non-existent term in botanical or horticultural science. It is likely that someone personally coined the phrase and applied it as a kind of humorous or derogatory labeling to a particular plant or tree. However, it is important to note that using obscene or insulting language in naming or describing plants is inappropriate.

2. "Middle Finger Tree" as a literal translation of a species name:

There is no known botanical plant or tree that is commonly or scientifically called "middle finger." However, in some languages and cultures, plants can have names that seemingly convey different meanings. For instance, in some regions, there is a tree that is called the "bird's nest tree." It is scientifically called the Tetrameles nudiflora, which is native to Southeast Asia and Australia, and its trunk has numerous hollow chambers where birds can create their nests. But a person who is unfamiliar with this tree may mistakenly assume that it is a type of bird rather than a tree. Thus, researching the scientific genus and species name of a plant can provide accurate information on its identification and characteristics.