marcescent

from The Collaborative International Dictionary of English v.0.48

Marcescent \Mar*ces"cent\, a. [L. marcescens, p. pr. of
   marcescere to wither, decay, fr. marcere to wither, droop:
   cf. F. marcescent.] (Bot.)
   Withering without falling off; fading; decaying.
   [1913 Webster]