The Collaborative International Dictionary of English v.0.48:

Mulberry \Mul"ber*ry\, n.; pl. Mulberries. [OE. moolbery,
   murberie, AS. murberie, where the first part is fr. L. morum
   mulberry; cf. Gr. ?, ?. Cf. Murrey, Sycamore.]
   1. (Bot.) The berry or fruit of any tree of the genus
      Morus; also, the tree itself. See Morus.
      [1913 Webster]

   2. A dark pure color, like the hue of a black mulberry.
      [1913 Webster]

   Mulberry mass. (Biol.) See Morula.

   Paper mulberry, a tree (Broussonetia papyrifera), related
      to the true mulberry, used in Polynesia for making tapa
      cloth by macerating and pounding the inner bark, and in
      China and Japan for the manufacture of paper. It is seen
      as a shade tree in America.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Broussonetia \Broussonetia\ n.
   a genus of shade trees including the paper mulberry
   (Broussonetia papyrifera) of East Asia.

   Syn: genus Broussonetia.
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

Broussonetia papyrifera
    n 1: shrubby Asiatic tree having bark (tapa) that resembles
         cloth; grown as a shade tree in Europe and America; male
         flowers are pendulous catkins and female are urn-shaped
         followed by small orange-red aggregate berries [syn: paper
         mulberry, Broussonetia papyrifera]