FLOWERING PLANTS AND FERNS OF ARIZONA 69 



1. Juniperus communis L., Sp. PL 1040. 1753. 



Kaibab Plateau and on the San Francisco, Navajo, Carrizo, White, 

 and Chuska Mountains (Coconino and Apache Counties), above 

 8,000 feet. Cooler parts of North America ; Eurasia. 



Common juniper, also known as dwarf juniper and groundcedar. 

 The species is represented in Arizona only by a dwarf form, var. 

 montana Ait. 



2. Juniperus pachyphloea Torr., U. S. Rpt. Expl. Miss. Pacif. 4: 142. 



1857. 



Common in the southeastern and central parts of the State, extend- 

 ing at least as far north as Flagstaff (Coconino County) and west to the 

 Baboquivari Mountains (Pima County), 4,500 to 8,000 feet. Western 

 Texas to Arizona and Mexico. 



Alligator juniper. This, the largest of the Arizona species, is usually 

 a tree, exceptionally attaining a height of 20 m. (65 feet). It rarely 

 occurs in pure stands. 



3. Juniperus scopulorum Sarg., Gard. and Forest 10: 420. 1897. 



Juniperus virginiana L. var. scopulorum Lemmon, West-Amer. 

 Cone-Bearers ed. 4, 114. 1900. 



Kaibab and Coconino Plateaus to the Mogollon Escarpment, also 

 Lukachukai and White Mountains (Coconino, Apache, and Gila 

 Counties), 5,000 to 9,000 feet, Alberta and British Columbia to 

 New Mexico, Arizona, and Nevada. 



Rocky Mountain juniper. The form with drooping branchlets, 

 called "weeping juniper," is not uncommon in Arizona. The tree is 

 graceful and highly ornamental despite the usually sparse foliage, 

 reaching a height of 6 m. (20 feet) and a trunk diameter of 45 cm. 

 (18 inches). 



4. Juniperus monosperma (Engelm.) Sarg., Silva North Amer. 10: 



89. 1896. 



Juniperus occidentalis Hook. var. monosperma Engelm., Acad. 



Sci. St. Louis Trans. 3: 590. 1877. 

 Juniperus gymnocarpa Cory, Rhoclora 38: 184. 1936. 



Common and well distributed over the State, except in the north- 

 eastern and the extreme western and southwestern portions, occasion- 

 ally forming forests, as on the slope of the Coconino Plateau east of 

 Flagstaff, but more often growing with Utah juniper or other trees, 

 3,000 to 5,000 feet or somewhat higher. Kansas to Nevada and south- 

 ward, probably extending into Mexico. 



Oneseed juniper. Fruits with exposed seeds, the principal dis- 

 tinguishing character of J. gymnocarpa Cory, are a not uncommon 

 abnormality. 



5. Juniperus utahensis (Engelm.) Lemmon, Calif. Board Forest. Rpt. 



3: 183. 1890. 



Juniperus californica Can*, var. utahensis Engelm., Acad. Sci, 

 St. Louis Trans. 3: 588. 1877. 



Abundant over most of the State north of the Gila River, 3,000 to 



7,500 feet. Southern Idaho to New Mexico, Arizona, and California. 



Utah juniper. The most valuable and abundant species of juniper 



