Preliminary Flora of the Lower Bavispe Valley, Sonora, Mexico

The flora of the lower Río Bavispe Valley from the Huásabas area south to the Río Áros at 430 to 1,510 m. elevations (1,410 to 4,954 ft.) was studied from 1995 to 2016. A total of 401 plant taxa in 74 families and 274 genera were recorded in the lower Río Bavispe Valley study area, including 24 non-native species (6.0%). The families with the most species were Asteraceae (50), Fabaceae (50), Poaceae (42), Euphorbiaceae (20), Malvaceae (19), Cactaceae (13), Solanaceae (15), and Pteridaceae (11), representing 54.9% of the flora. The genera with the most species were Acacia (8), Bouteloua (7), Euphorbia (6), Quercus (6), Boerhavia (5), Muhlenbergia (5), and Opuntia (5).

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Thomas Van Devender, Ana Reina-Guerrero, José Jesús Sánchez-Escalante

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