The peridium is round, often slightly depressed above, plicate below, where it is abruptly contracted into a long stem-like base.
The margin of the cap, especially in old plants, is somewhat wavy or plicate as in Lactarius fuliginosus.
Pileoli innumerable, inflexed and appressed, plicate, brown.
The plant is recognized by the pale yellow color of the caps and the plicate striate character of the margin.
The third glume is broadly ovate-oblong, subacute, 1-nerved, paleate; the palea is plicate in the median line.
Stipe very short, plicate, red-brown, arising from a small hypothallus.
plicate pli·cate (plī'kāt') or pli·cat·ed (-kā'tĭd)
Arranged in folds like those of a fan; pleated.