The Collaborative International Dictionary of English v.0.48:

Parrot's-bill \Par"rot's-bill`\ (p[a^]r"r[u^]ts*b[i^]l`), n. [So
   called from the resemblance of its curved superior petal to a
   parrot's bill.] (Bot.)
   The glory pea. See under Glory.
   [1913 Webster]