Pleurotus magnificus

Overview

Pleurotus magnificus is an oyster mushroom known from southern Brazil. The Pleurotus genus contains the commonly cultivated oyster mushrooms, but this species is a wild fungus whose food use is recorded only in a limited way.

The supplied catalogue records the food use as newly recorded in a 2024 audit, and the evidence as limited, including author observations rather than proof of widespread traditional use.

Taxonomy

The species was described under the name Pleurotus magnificus by Rick, and the name is the one used in the current record. A Phytotaxa paper on rare veiled Pleurotus from the Neotropics covers neotypification of the species. It reports first records of the species in Minas Gerais, Paraná and São Paulo, and a new record in Santa Catarina.

Habitat and ecology

The 2024 IUCN assessment describes the species as a wood-decaying fungus restricted to Araucaria forest. It grows on large dead trunks of gymnosperms and angiosperms, in gregarious, scattered or caespitose growths.

The assessment gives records from nine sites in Brazil, in the states of Rio Grande do Sul, Santa Catarina, Minas Gerais, Paraná and São Paulo, at altitudes it gives as 800 to 1,700 metres. The page is internally inconsistent on the upper limit, so the figure should be read as approximate.

Conservation status

The IUCN Red List assessment, dated 25 January 2024, lists the species as Endangered. The assessment estimates about 8,750 mature individuals in one subpopulation and a suspected decline of at least 50 per cent over 40 years.

The main threats are loss and decline of Araucaria forest habitat, mainly from human disturbance. The assessment states that about 90 per cent of the original Araucaria forest cover has been lost, and that most remaining fragments are under 50 hectares.

Food use and cultivation

The IUCN assessment describes the species as edible and consumed by local populations. It states that cultivation is unconfirmed and that more work is needed to know whether it could be cultivated.

No commercial cultivation method, substrate or yield is recorded for this species here. The Pleurotus genus is widely cultivated, but that does not establish cultivation of P. magnificus.

Safety and identification

The IUCN assessment says that use of the species is viewed as safe. That is a statement in a conservation document, not a food-safety evaluation, and it does not establish a safe preparation or a safe quantity.

Identification of Pleurotus from wood requires a specialist, and the Neotropical veiled species are the subject of taxonomic work. Anyone considering a wild oyster mushroom should confirm the species with a qualified mycologist before eating it.