Screwbean mesquite flowers Prosopis pubescens, fruit
Prosopis pubescens (Screwbean mesquite) #23916 Prosopis pubescens
Common Name Screwbean Mesquite, Tornillo
Latin Name Prosopis pubescens
Family Fabaceae
Sunset zones / USDA zones 10-13,27-30 / 7-10
Type / Form Tree / Medium
Native Habitat Below 4,000 feet in deserts from California to Texas including Mexico
Soil Dry to moist, decomposed granite, sand, clay loam, low to some organic content, well drained
Water Once per month
Exposure Full sun
Height X Width 25 feet X 25 feet, usual 15 feet X 15 feet
Protective Mechanism Thorns
Leaves Alternate, bipinnately compound, 1 to 2 inches long, usually with only two major leaflets (may occasionally have 2 to 3 pairs), each leaflet with 6 to 9 pairs of narrow minor leaflets (1/2 to 1 inch long) with entire margins and a fuzzy surface, green to gray-green above, paler below.
Flowers Small pale yellow to yellow-green in 2 to 3 inch long slender spikes in groups of 2 to 6, appearing late spring to early summer. Fruit a very unique, tightly coiled legume, 1 to 2 inches long, light brown, ripening in mid to late summer.
Bark / Roots Very distinct, rough shreddy to scaly, outer older bark gray-brown, newer bark reddish brown. Twig light reddish brown, slightly zigzag with obvious paired slender spines (up to 1 inch long) at the base of each leaf, spine is nearly white, knobby spur branches may also be present. / Deep roots
Maintenance Low
Propagation Seed
Pest and diseases  
Landscape uses Erosion control, rock garden, low maintenance, parkway
Garden Suitability Fragrant, Songbird, Sonoran, Butterfly, Ethnobotanical
Ornamental Value Yellow flowers in late spring, fragrant, interesting seedpods
Nature Value Soil stabilizer, flowers used by butterflies and bees, beans eaten by birds and mammals
Native American Uses Beans ground into pinole, medicinal, bark used for basketry, cloth, and rope, wood used for firewood and making tools, gum used for glues and paint, catkins eaten
Links  
    Images and data http://www.desert-tropicals.com/Plants/Fabaceae/Prosopis_pubescens.html
    Images and data http://en.wikipedia.org/wiki/Prosopis_pubescens
    Images and data http://davesgarden.com/guides/pf/go/85886/
    Images and data http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=6879
    Images and data http://www.wildflower.org/plants/result.php?id_plant=PRPU
    Images and data http://www.cnr.vt.edu/dendro/dendrology/syllabus2/factsheet.cfm?ID=540
    Images and data http://ag.arizona.edu/pima/gardening/aridplants/Prosopis_pubescens.html
    Images and data http://www.fs.fed.us/database/feis/plants/tree/propub/all.html
    Images and data http://cals.arizona.edu/pima/gardening/aridplants/Prosopis_pubescens.html
    Images and data http://www.cnr.vt.edu/dendro/dendrology/Syllabus2/factsheet.cfm?ID=540
    Distribution map http://plants.usda.gov/java/profile?symbol=PRPU
    Nursery, images, and data http://www.laspilitas.com/nature-of-california/plants/prosopis-pubescens
    Nursery, images, and data http://www.cnplx.info/nplx/species?taxon=Prosopis+pubescens
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