The Collaborative International Dictionary of English v.0.48:

Stamineal \Sta*min"e*al\ (st[.a]*m[i^]n"[-e]*al), Stamineous
\Sta*min"e*ous\ (-m[i^]n"[-e]*[u^]s), a. [L. stamineus, from
   stamen thread.]
   1. Consisting of stamens or threads.
      [1913 Webster]

   2. (Bot.) Of or pertaining to the stamens; possessing
      stamens; also, attached to the stamens; as, a stamineous
      nectary.
      [1913 Webster]