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Abstract Detail

Recent Topics Posters

Verrier, James [1].

Flora of the Santa Catalina Mountains, southeastern Arizona.

The Santa Catalina Mountains are located in Pima and Pinal counties, southeastern Arizona. The study area is defined as approximately 259,000 acres (104,813 hectares) or 405 mi2 (1049 km2), spanning an elevational gradient of 6457 ft (1968 m). Located on the northwestern edge of the Madrean-influenced Sky Island complex of southeastern Arizona and northern Sonora, highly diverse plant communities range from Sonoran Desert to subalpine forest. A total of 380 days of fieldwork were conducted between 2007–2017, including extensive exploration of the remote east side of the mountains. The vascular flora includes 1360 taxa in 127 families, 628 genera, 1307 species, and 287 infraspecific taxa, and is currently the largest of any range in southern Arizona. The three largest plant families are Asteraceae, Poaceae, and Fabaceae, with 213, 187 and 107 taxa respectively. Euphorbia, Muhlenbergia, and Dalea are the largest genera with 24, 22 and 16 species. A total of 375 taxa are found on limestone or dolomitic substrates. Non-native plants are represented by 167 taxa and comprise 12.3% of the total flora. A total of 375 (27.6%) taxa are found on limestone or dolomitic substrates. The flora also includes 169 non-vascular plants from 36 families, based on over 1150 collections from 18 national herbaria. The floristic diversity of this Sky Island represents nearly a third of the entire state flora while occupying less than half a percent of the state. Geographic location, elevational gradient, geological diversity, and a high percentage of species found at the edge of their ranges contribute to the rich diversity of this unique mountain range.

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Flora of the Santa Catalina Mountains (PDF of Publication)

1 - University of Arizona, School of Plant Sciences, Tucson, Arizona, USA

Sky island.

Presentation Type:
Session: P, Recent Topics Posters
Location: Arizona Ballroom/Starr Pass
Date: Monday, July 29th, 2019
Time: 5:30 PM
Number: PRT001
Abstract ID:1345
Candidate for Awards:None

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