The Collaborative International Dictionary of English v.0.48:

Plane \Plane\, n. [F., fr. L. platanus, Gr. ?, fr. ? broad; --
   so called on account of its broad leaves and spreading form.
   See Place, and cf. Platane, Plantain the tree.] (Bot.)
   Any tree of the genus Platanus.
   [1913 Webster]

   Note: The Oriental plane (Platanus orientalis) is a native
         of Asia. It rises with a straight, smooth, branching
         stem to a great height, with palmated leaves, and long
         pendulous peduncles, sustaining several heads of small
         close-sitting flowers. The seeds are downy, and
         collected into round, rough, hard balls. The Occidental
         plane (Platanus occidentalis), which grows to a great
         height, is a native of North America, where it is
         popularly called sycamore, buttonwood, and
         buttonball, names also applied to the California
         species (Platanus racemosa).
         [1913 Webster]

WordNet (r) 3.0 (2006):

Platanus orientalis
    n 1: large tree of southeastern Europe to Asia Minor [syn:
         oriental plane, Platanus orientalis]