There isn't a tree with fruit that *exactly* looks like a round brain. However, there are a few fruits that share some similarities in shape or texture:

1. The Brain Fruit (Monkey Brain):

* Scientific name: *Lecythis zabucajo*

* Origin: Amazon rainforest

* Appearance: This fruit has a distinctive, wrinkled, brain-like exterior. The inside is white and fleshy.

* Taste: The flavor is described as bland, but it can be used in jams and jellies.

2. Rambutan:

* Scientific name: *Nephelium lappaceum*

* Origin: Southeast Asia

* Appearance: This fruit is covered in hair-like projections that give it a "brain-like" look, though not as pronounced as the brain fruit.

* Taste: It has a sweet and tangy flavor, reminiscent of lychee.

3. Buddha's Hand:

* Scientific name: *Citrus medica var. sarcodactylis*

* Origin: Southeast Asia

* Appearance: This fruit is a citrus fruit with finger-like lobes that can resemble brain folds.

* Taste: It has a very strong citrus aroma and is typically used for its zest.

Important Note: These are just fruits that *resemble* brains in some way. There is no known fruit that is a perfect replica of a brain.