The poisonous and/or acrid L. repraesentaneus
, L. torminosus
, L. olympianus
and L. rufus
are similar in appearance. They differ in that the cut flesh exudes a white rather than orange milk and the flesh does not eventually discolor to greenish. The edible but rare L. rubrilacteus
differs in that the cap and latex are more reddish. The edible and similar-looking L. deterrimus
differs in that the cut flesh exudes an orange milk that stains the surface purplish, then dull, dark green. It is sometimes considered a variety of this species.