exuberant

Very cheery and peppy; extremely cheerful, energetic and enthusiastic.

exuberant feeling

He was a man of exuberant fancy, and, withal of an authority so irresistible that, at his will, he turned his varied fancies into facts.

Abundant, luxuriant.

exuberant foliage

It pencilled each flower with rich and variegated hues, and threw over its exuberant foliage a vesture of emerald green.

Unusually proliferative, widespread or extreme, particularly in relation to a disease, immune reaction, or tissue