Luxuriant, a.
Etymology: [L. luxurians, p. pr. of luxuriare: cf. F. luxuriant. See Luxuriate.]
Exuberant in growth; rank; excessive; very abundant; as, a luxuriant growth of grass; luxuriant foliage. Prune the luxuriant, the uncouth refine. Pope. Luxuriant flower (Bot.), one in which the floral envelopes are overdeveloped at the expense of the essential organs.
Shades of meaning
Fernald has no entry of its own for luxuriant; he lists it under plentiful.
Where he writes about it:
Luxuriant is used especially of that which is abundant in growth; as, a luxuriant crop. — from plentiful