Grass is luxuriant in summer.

She was dressed luxuriantly.

It grew luxuriantly.

Charming was the chirp of the grasshoppers, delightful was the bleating of the flocks, luxuriant the aspect of the fields.

Red cows grazed in well-hedged fields where the lush grasses and more luxuriant vegetation spoke of a richer, if a damper climate.