Strombocarpa pubescens

This plant grows to about . It has light brown bark, usually short, straight spines 1 to 3 centimeters long, twice-compound leaves, and numerous small yellowish flowers appearing in elongate spikes. The tightly twisted seedpods (legumes) are up to 5 centimeters long and very much resemble turned screws. This morphology may have been an evolutionary defense against seed predators such as bean weevils (Bruchinae). The seeds germinate after being scarified in the digestive tracts of animals that eat them. The plant also grows in a clockwise spiral. ==Habitat==

It is found along streams and valleys in deserts, particularly in damp or saline soil. It grows alongside common plants of this habitat type, such as arrowweed (Pluchea sericea) and tamarisks. It can be found on playas and other areas of alkaline substrates. This and other mesquite species are dominant plants in the Mesquite Bosque-mesquite woodlands, a common habitat type in the desert southwest region. Many types of animals readily eat the seedpods, including several bird and rodent species and coyotes. Many species of birds nest and roost in the trees, and small mammals find shelter in thicketlike stands. ==Uses==

Food Like those of other Strombocarpa, Neltuma and Prosopis species, Screwbean Mesquite has nutritious seedpods that can be eaten. Mesquite is a traditional Native American food source, being used to make meal, cakes and syrup. Wood Native Americans found Screwbean wood valuable for building, for making tools and weapons, and as firewood. ==See also==