Wordnet 3.0
ADJECTIVE (1)
1. 
 composed of vegetation or plants; 
- Example: "regions rich in vegetal products"- Example: "vegetational cover"- Example: "the decaying vegetative layer covering a forest floor"[syn: vegetal, vegetational, vegetative]
WordNet (r) 3.0 (2006):
vegetational
    adj 1: composed of vegetation or plants; "regions rich in
           vegetal products"; "vegetational cover"; "the decaying
           vegetative layer covering a forest floor" [syn:
           vegetal, vegetational, vegetative]