Distribution

Oneseed juniper is common in the desert grassland and pinyon-juniper ranges throughout New Mexico and in southeastern and north-central Arizona. This species also occurs in southern Colorado, western Texas and western Oklahoma [5,99]. Occurrence of oneseed juniper in Mexico is unclear because it is very similar morphologically to other species, especially Pinchot juniper. According to Adams [1,2], who conducted chemosystematic studies and reviewed taxonomic literature: "The one-seeded juniper group in Mexico is very complex."

The Flora of North America also provides distribution information on oneseed juniper for North America.