Background and Aims:

Inventories of flora and mycobiota of the municipality San Sebastián del Oeste (SSO) located in western Jalisco, Mexico, have already been published by several authors of this work. However, these compilations exclude specific information regarding the conservation status of the cited species. The objective of this contribution is to provide data regarding the endemism and risk categories of these biological groups, which could contribute to strategies for their conservation.

Methods:

The published lists of the flora and fungi of the municipality were used as a base. Distributions of the species were determined after review of literature and digital databases. Subsequently the levels of endemism were defined. The risk categories were designated by comparing both mentioned lists, with those of the NOM-059-SEMARNAT-2010, the IUCN Red List of Threatened Species (LR-IUCN) and the CITES appendices. For plants, the Red List of Mexican cloud forest trees (LR-BMM) was also consulted.

Key results:

A list of 407 vascular plant species and infraspecific taxa is presented. Of that list, 332 elements are in one or more risk categories (38 in NOM-059-SEMARNAT-2010, 121 in LR-BMM, 80 in CITES and 205 in LR-IUCN). Additionally, 94 are endemic to western Mexico, of which 31 are restricted to Jalisco and of these, six are micro-endemics, exclusive to the municipality. Regarding fungi, five species are recognized in the NOM-059-SEMARNAT-2010 and five in the LR-IUCN. There are no CITES records for the fungi.

Conclusions:

San Sebastián del Oeste is an important reservoir of endemic and threatened plants. The knowledge of the conservation status of the mycobiota is more incipient than in plants.

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