The Final Trial is the last area to be accessed in Pikmin. In the area selection menu, it is across a small body of water from the other areas, and has radically different terrain. It only has one part and is almost enemy-free, save the Emperor Bulblax, which holds the last ship part, the Secret Safe.
It should be noted that this area, in a way, tests the player's knowledge on the Pikmin. From the landing site, the area "splits" into three paths. The left path focuses on Red Pikmin, due to the fire geysers. The center path contains water which only Blue Pikmin can traverse through. And the path on the right contains bomb-rocks, which only Yellow Pikmin can hold.
This plant remains erect after withering and losing its color, so we can only hypothesize about the true color of the plant's plumage. However, local soil analysis indicates trace amounts of dormant seeds, making it not hard to imagine that the area was thick with these plants in the summer.