Orange leaves.

August 18. 

Thursday. 

Half the leaves of some cherries in dry places are quite orange now and ready to fall.

H. D. Thoreau, Journal, August 18, 1859

See August 18, 1853 ("Many leaves of the cultivated cherry are turned yellow, and a very few leaves of the elm have fallen.");  August 29, 1852 (The first leaves begin to fall; a few yellow ones lie in the road this morning, loosened by the rain and blown off by the wind.") October 13, 1857 ("Our cherry trees have now turned to mostly a red orange color.")