confervous

from The Collaborative International Dictionary of English v.0.48

Confervous \Con*fer"vous\, a.
   Pertaining to confervae; consisting of, or resembling, the
   confervae.
   [1913 Webster]

         Yon exiguous pool's confervous scum.     --O. W.
                                                  Holmes.
   [1913 Webster]