Ziziphus obtusifolia

Common Name: Graythorn, Lotebush
Oˊodham Name: U:spaḍ (U:spadt) Audio
Group: Shrubs － Desert, Desert Grassland

Description

Ziziphus obtusiflolia is a large, densely branched shrub that may reach 10 ft wide and tall. It inhabits coarse sandy soils between 1500 and 5000 ft elevation. Most of the year, the plant is leafless and the densely pubescent twigs lead to an overall grayish appearance. Twigs terminate in spines which, combined with the grayish stems, leads to the common name "graythorn". During early Spring and the summer monsoon, elliptical shaped, lightly pubescent leaves are abundantly produced and obscure the stems to give the plant an overall green appearance. Tiny orange flowers are produced mainly in the Spring. In late Spring, they are replaced by red fruit which become purple berries when ripe. The berries are an important food source for desert birds. Viewed from a distance, this species is often confused with Lycium exsertum.

Classification

Kingdom Plantae － Plants

Subkingdom Tracheobionta － Vascular plants

Superdivision Spermatophyta － Seed plants

Division Magnoliophyta － Flowering plants

Class Magnoliopsida － Dicotyledons

Subclass Rosidae

Order Rhamnales

Family Rhamnaceae － Buckthorn family

Genus Ziziphus Mill. － jujube

Species Ziziphus obtusifolia (Hook. ex Torr. & A. Gray) A. Gray － lotebush

Variety Ziziphus obtusifolia (Hook. ex Torr. & A. Gray) A. Gray var. canescens (A. Gray) M.C. Johnst. － lotebush

More Information

USDA Plant Profile and Map