Background:

San Miguel Tolimán, in the municipality of Tolimán, Querétaro, is part of the Sierra Gorda-Río Moctezuma priority region for conservation. In the area along the Tolimán River there is gallery forest vegetation (BG) adjacent to xerophytic scrub (MX); the site lacks an inventory of its flora.

Questions:

What is the angiosperm richness of the MX and BG? What is the percentage of native, endemic, and at-risk species in both communities?

Study species and data description:

List of angiosperms in the area.

Study site and date:

MX and BG of San Miguel Tolimán, municipality of Tolimán, Querétaro, Mexico; November 2017 to September 2018.

Methods:

Bimonthly sampling of angiosperms during one year in 25 ha/community.

Results:

Two vegetation types were recognized: MX and disturbed gallery forest (BGP). 131 species were recorded: 54 in the MX (19 endemic and 16 at risk) and 79 in the BGP (12 exotic; 8 endemic and 9 at risk), with two species shared among the communities. In the MX, the families Asteraceae and Cactaceae were the most diverse and in the BGP Asteraceae followed by Poaceae and Malvaceae. In both communities herbaceous followed by shrubs were the biological forms with the highest number of species.

Conclusions:

This study shows the great diversity of species present in a relatively small area and constitutes a precedent for prioritizing the conservation of plant resources in this zone.

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