Definition of "rufescent"

The more inland, lighter race is distinguished from A. u. uropygialis in being much paler on the back, by the edgings of the forehead scallopings and auriculars being paler, and by having the brown of the forehead less deep and less rufescent.

1937, The Emu: Official Organ of the Australasian Ornithologists' Union

Flesh unchanging or slowly rufescent.

1972, Edred John Henry Corner, Boletus in Malaysia, page 42

Flesh white, but quickly rufescent where cut, at first full, becoming more spongy stuffed, and frequently hollow in old specimens, [...]

1975, Michael Jordan, A Guide to Mushrooms, page 72