36 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
TypE Locauity: ‘‘On the mountains back of Clifton, in the extreme eastern part of 
Arizona,” 
Rance: Mountains of southern Arizona and northern Mexico, coming into the 
southwestern corner of New Mexico. 
New Mexico: San Luis Mountains (Mearns 437, 560, 2244). 
2. JUNIPERUS L. Junieer. CEDAR. 
Large or small shrubs with awl-shaped or scalelike leaves; cones indehiscent, fleshy 
or fibrous; seeds 1 to 4, ovoid. 
KEY TO THE SPECIES. 
Leaves on mature branches not scalelike, 6 to 12 mm. long, smooth 
and shining above, glaucous beneath; a low shrub less that 
a meter high, often spreading. ...........2....0.22-.200 000 1. J. sibirica. 
Leaves on mature branches scalelike, less than 5 mm. long, of the 
same color on both surfaces; large shrubs or small trees 
several meters high, never spreading. 
Seeds 3 or 4; branchlets smooth; leaves with a conspicuous 
resinous exudate; bark of the trunk broken into irregu- 
lar quadrangular plates..........-..--..----+---++--+-- 2. J. pachyphloea. 
Seeds 1 or 2; branchlets mostly scaly; leaves not with a 
resinous exudate; bark shreddy or stringy. 
Fruit large, about 15 mm. in diameter...............---- 3. J. megalocarpa. 
Fruit small, 10 mm. in diameter or less. 
Branchlets slender, drooping; fruit 2-seeded; leaves 
S-ranked......... 222.222.2222 2c eee ee eee eee 4. J. scopulorum. 
Branchlets rigid, erect; fruit mostly 1-seeded; leaves 
2-ranked. 
Fruit large, 7 to 10 mm. long, oblong, brown and 
fibrous at maturity; leaves short and 
obtuse..........2... 22. 5. J. utahensts, 
Fruit small, 5 to 7 mm. long, little if at all longer 
than thick, bluish, fleshy; leaves acute, 
long....... cece eee e eee e eee e ee eeeeeees 6. J. monosperma. 
1. Juniperus sibirica Burgsd. Anleit. Holz. no. 272. 1787. JUNIPER. 
Juniperus communis sibirica Rydb. Contr. U. 8. Nat. Herb. 3: 533. 1896. 
TYPE LOCALITY: Siberia, 
Rance: New Mexico to Alaska and Labrador. 
New Mexico: Chama; Santa Fe and Las Vegas mountains; Taos Mountains; San- 
dia Mountains. Deep woods, in the Canadian and Hudsonian zones. 
2. Juniperus pachyphloea Torr. U.S. Rep. Expl. Miss. Pacif. 4: 142. 1857. 
ALLIGATOR JUNIPER. 
TypE Locauiry: Zuni Mountains, New Mexico. 
Rance: Arizona and western Texas to northern Mexico. 
New Mexico: Common from the Zuni Mountains, Black Range, Capitan Moun- 
tains, and Guadalupe Mountains southward and westward across the State. Low 
hills, in the Upper Sonoran Zone. 
A round-topped tree 10 meters high or less, with a short, thick trunk, covered with 
thick, checkered bark which gives it its name of ‘‘alligator-bark juniper.’’ On the 
cliffs at higher elevations it often attains a great age, developing a short and very 
thick trunk. The fruit is rather large for the genus, 8 to 10 mm. in diameter, ripen- 
ing the second year. This is the common juniper in the southern part of the State in 
the foothills. The wood is used for fuel and to some extent for fence posts, although 
that of other species is preferred. 
