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Abstract Detail

Recent Topics Posters

Verrier, James [1], Carnahan, Susan [2], Rodden, Iris [3].

Flora of vascular plants of the Santa Rita Mountains, Pima and Santa Cruz counties, southeastern Arizona.

This project represents the first undertaking to create a botanical inventory of vascular plants of the Santa Rita Mountains. This biologically rich Madrean sky island spans Pima and Santa Cruz counties; the defined study area is approximately 151,000 acres (61,107 hectares) along a 5856 ft (1785 m) elevational gradient. To date, 101 days of field work have been performed since August 2016, and we anticipate completion by October 2019. This listing is specimen-based and currently includes 1,136 taxa in 110 families. While 35 historically collected species have been verified and 133 new taxa have been added to the flora, 81 historical records remain unverified and are excluded from this checklist. Non-native plants are represented by 90 taxa (7.9%). The Santa Rita Mountains are the 3rd most botanically diverse range in southern Arizona. Many taxa with Mexican affinities are found at or near their northern limit in this highly diverse sky island, along with other rare species such as orchids, jaguars, and ocelots. The flora of this unique range faces many threats including three proposed open-pit mines, heavy livestock grazing, long-term drought, and climate change.

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1 - University of Arizona, School of Plant Sciences, Tucson, Arizona, USA
2 - University of Arizona, School of Plant Sciences, Tucson, AZ, USA
3 - University of Arizona, School of Natural Resources and the Environment, Tucson, AZ, USA

Sky island
Santa Rita Mountains.

Presentation Type:
Session: P, Recent Topics Posters
Location: Arizona Ballroom/Starr Pass
Date: Monday, July 29th, 2019
Time: 5:30 PM
Number: PRT002
Abstract ID:1346
Candidate for Awards:None

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