The Collaborative International Dictionary of English v.0.48:
Rushy \Rush"y\, a. 1. Abounding with rushes. [1913 Webster] 2. Made of rushes. [1913 Webster] My rushy couch and frugal fare. --Goldsmith. [1913 Webster]WordNet (r) 3.0 (2006):
rushy adj 1: abounding in rushes; "a rushy marsh"