leucophyllous

from The Collaborative International Dictionary of English v.0.48

Leucophyllous \Leu*coph"yl*lous\ (l[-u]*k[o^]f"[i^]l*l[u^]s or
   l[=u]`k[-o]*f[i^]l"l[u^]s), a. [Gr. leyko`fyllos; leyko`s
   white + fy`llon a leaf.] (Bot.)
   Having white or silvery foliage.
   [1913 Webster] Leucoplast