The Collaborative International Dictionary of English v.0.48:

juba \ju"ba\, n.; pl. jub[ae] (-b[=e]). [L., a mane.]
   1. (Zool.) The mane of an animal.
      [1913 Webster]

   2. (Bot.) A loose panicle, the axis of which falls to pieces,
      as in certain grasses.
      [1913 Webster]