Plant Data

Names and Taxonomy

  • Common Names: Screwbean Mesquite
  • Synonyms: Prosopis emoryi, Prosopis pubescens, Strombocarpa brevifolia
  • Family: Fabaceae (Pea)
  • Genus Information: 1 species in NV, 10 in CA, 11 in US

Habit and Size

  • Duration: perennial
  • Habit: small tree, shrub
  • Shape: upright
  • Size: up to 23 feet tall (7 m)
  • Stem: light brown bark

Leaves

  • Color: green
  • Shape: twice-compound leaves
  • Edge: smooth
  • Arrangement: bi-compound
  • Leaf Retention: evergreen or deciduous when freezing

Flowers and Fruit

  • Sex: monoecious
  • Flower Color: yellow
  • Flower Size: 2 inch (5 cm)
  • Number of Petals: many
  • Bloom: Feb, Mar, Apr, May, Jun, Jul, Aug, Sep
  • Fruit: The tightly twisted seedpods (legumes) are up to 5 centimeters long and very much resemble turned screws. 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.

Habitat and Growing Conditions

  • Water Use: moderate
  • Light: full sun
  • Soil: Tolerates poorly drained and saline soils
  • Habitat: washes and along rivers in the desert, indicating the presence of groundwater

Distribution

  • Distribution: AZ, CA, NM, NV, TX, UT
  • Seen: Henderson Bird Viewing Preserve
  • Elevation: to 4000ft (1300 m)

Photographs

Screwbean Mesquite (Strombocarpa pubescens)

Henderson Bird Viewing Preserve

Screwbean Mesquite (Strombocarpa pubescens)

Henderson Bird Viewing Preserve

Screwbean Mesquite (Strombocarpa pubescens)

Henderson Bird Viewing Preserve

Screwbean Mesquite (Strombocarpa pubescens)

Henderson Bird Viewing Preserve