Far-eastern wrinkled bolete

Overview

The far-eastern wrinkled bolete, Rugiboletus extremiorientalis, is a bolete in the family Boletaceae. It is the type species of its genus, and it was earlier placed in the genus Krombholzia under the name Krombholzia extremiorientalis. Reports describe it as an alpine species from eastern Asia.

The catalogue lists it as a named food bolete sold in Pu'er markets in Yunnan Province, China. That food record is the reason it is on this list, and it is the part of the record the evidence reviewed do not confirm.

Taxonomy and the genus

Rugiboletus is a genus of boletes. The species described for it as its type is R. extremiorientalis. A second species, R. brunneiporus, is recorded from southern China and India in the same source. The catalogue marks the name as a research name that has not been validated against current taxonomy, so the name and its relationships should be checked against a nomenclature database before use.

Habitat

The species is described as alpine and as occurring in eastern Asia. The catalogue describes its ecology as an ectomycorrhizal forest fungus, which means it forms a partnership with tree roots. The evidence reviewed do not give a host tree or a fruiting season for the species, so none is recorded here.

The catalogue records market sale in Pu'er, in the south of Yunnan. Because the species is described as alpine, the evidence reviewed leave the origin of any market supply unexplained, and that is a reason to keep the market record in question until it is checked.

Food use: what is recorded and what is not

The catalogue records food use in Pu'er markets in Yunnan. A 2022 ethnomycological survey of wild mushrooms in Pu'er Prefecture recorded local names, habitats, prices and cooking methods, and it focused on market vendors and ectomycorrhizal species. Its market list names other popular boletes and species, including Boletus spp., Lactifluus volemus and Termitomyces spp., but it does not name Rugiboletus.

The evidence reviewed therefore do not confirm that this species is sold in Pu'er markets or that it is documented as food in Yunnan. The record stays on the page as the catalogue's claim, with that gap stated. No local name, dish or preparation is given here, because none was found in the record read.

Safety and what is not known

The evidence reviewed do not give a toxicity or safety assessment for this species, and the catalogue asks for species-level review of its local food use and safety. A bolete is not safe to eat because a market sells it, and nothing on this page is advice for collecting or identifying wild boletes.