– London plane
Distribution: Occurring east of the Cascades crest along the Columbia River in Washington; scattered locations from central Washington to California, also in eastern North America.
Habitat: River shorelines and adjacent wet meadows.
Origin: Introduced from cultivation
– American plane-tree, sycamore
Distribution: Occurring along the shores of the Columbia River in central and south-central Washington; common and native in central and eastern North America.
Habitat: Near streams, lakes, and moist ravines, often where disturbed.
Growth Duration: perennial