Gray Tree is a 1911 oil painting by Piet Mondrian.

This painting was made in 1911 on canvas on a board measuring 78.5 × 107.5 cm.

[1] The work came at a time when Mondrian was beginning to experiment with Cubism: its foreground and background elements seem to intermingle, and the palette is very restricted.

The tree is subtly oval in form, following another Cubist practice seen in works by Pablo Picasso and Georges Braque.

Mondrian's oval became explicit, framing the work, in paintings that followed over the next three or four years.