Cultivator-mycologists often incorrectly use the name Pleurotus sajor-caju for some warm weather varieties of Pleurotus pulmonarius, a commonly cultivated species of Oyster Mushroom.

The real Pleurotus sajor-caju is a completely separate species of mushroom, which was returned to the genus Lentinus by Pegler in 1975.

However, the name Pleurotus sajor-caju has been misapplied so often, even in scientific texts, that confusion about the species name is persistent.

has a distinct veil, a persistent ring on the stipe, and flesh composed of trimitic or dimitic hyphae.

[1] Media related to Lentinus sajor-caju at Wikimedia Commons