USA, Arizona, Cochise County, Tombstone, I-10 to Highway 80/Benson exit, south on Hwy 80 to Tombstone, Allen Road and 11th Street, south on gravel road past Parson's Rest at wash.
Common shrub, height 4 feet, diameter 6 feet, stems light gray with the base being darker; leaves alternate, elliptic, fragrant, green; disk flowers only, very resinous.