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Populus fremontii, commonly known as Frémont's cottonwood, [1] is a cottonwood (and thus a poplar) native to riparian zones of the Southwestern United States and northern through central Mexico. [2] It is one of three species in Populus sect. Aigeiros. The tree was named after 19th-century American explorer and pathfinder John C. Frémont.
Fremont's cottonwood (P. fremontii) is native to the southwestern United States and western Mexico. [3] In the United States, the species can be found in Arizona, California, Colorado, Idaho, Nevada, New Mexico, Texas, and Utah.
Pollution and reduction of rivers are threatening specific plants and animals including Fremont cottonwood (Populus fremontii) and Goodding's willow (Salix gooddingii), the threatened Gila trout (Oncorhynchus gilae), and the endangered southwestern willow flycatcher (Empidonax traillii extimus).
Fremont cottonwood (Populus fremontii) Ocotillo (Fouquieria splendens) Creosote bush (Larrea tridentata) Indian mallow (Abutilon palmeri) Brittlebush (Encelia farinosa) Desert agave (Agave deserti) California barrel cactus (Ferocactus cylindraceus) Banana yucca (Yucca baccata) Mojave yucca (Yucca schidigera) Rush milkweed (Asclepias subulata)
Populus deltoides (eastern cottonwood), in eastern, central, and southwestern United States, and parts of Canada and Mexico Populus fremontii (Fremont cottonwood), in the southwestern United States and Mexico
Populus deltoides – eastern cottonwood (eastern North America) Populus fremontii – Fremont cottonwood (western North America) Populus nigra – black poplar (Europe), placed here by nuclear DNA; cpDNA places it in sect. Populus (including Populus afghanica) Populus × canadensis (P. deltoides × P. nigra) – hybrid black poplar
There are several types of riparian forest, the South Fork Valley has the Great Valley Cottonwood Forest, distinguished by a majority of Fremont cottonwood and willow tree species. The understory is dense with wild rose and shade-tolerant Oregon ash. The soils are fine-grained alluvial with annual river flooding that maintains fertility.
A 1.2-mile (1.9 km) nature trail crosses Canebrake Creek, is wheelchair accessible, and has views of cottonwood-willow forest with several willow species (Salix gooddingii, S . lasiandra, and S . laevigata) and Fremont cottonwood (Populus fremontii) that intergrade with a relict stand of Joshua trees (Yucca brevifolia).