whitten tree

from The Collaborative International Dictionary of English v.0.48

Whitten tree \Whit"ten tree`\ [Probably from white; cf. AS.
   hwitingtre['o]w.] (Bot.)
   Either of two shrubs ({Viburnum Lantana}, and {Viburnum
   Opulus}), so called on account of their whitish branches.
   [1913 Webster]