Pikmin Adventure, the Pikmin themed attraction in Nintendo Land has a variety of plants exclusive to it. They typically do not affect gameplay in any way, they just serve as decorations. They can be unlocked as collectible figures in the Nintendo Land Plaza, however.
Abundant Mass
Monita's Notes
"This distinctive work of modern art conveys a sense of weight and permanence. Also, these are scattered all over the place underground, so please don't stub your toe."
Angular Sapling
Monita's Notes
"This fir tree is classified as an evergreen, long a symbol of vitality and eternal life. This one seems to be covered in snow, though. So much for the "ever green." Hah. Hah."'
Bulbous Sporehaven
Monita's Notes
"Perplexing, isn't it? Nobody knows if it's vegetable or...something more sinister."