Juniperus occidentalis

Hooker

Fl. Bor.-Amer. 2: 166. 1838.

Common names: Western juniper
Endemic
Treatment appears in FNA Volume 2.

Trees monoecious or dioecious, to 20 (–30) m, single-stemmed; crown rounded to conical. Bark redbrown to brown, exfoliating in thin strips, that of small branchlets (5–10 mm diam.) smooth, that of larger branchlets exfoliating in scales or flakes. Branches spreading to ascending; branchlets erect, 3–4-sided in cross-section, ca. 2/3 or less as wide as length of scalelike leaves. Leaves green, abaxial glands ovate to elliptic, conspicuous, with yellow or white exudate, margins denticulate (at 20×); whip leaves 3–6 mm, not glaucous adaxially; scalelike leaves 1–3 mm, not overlapping, rounded, apex acute to obtuse, appressed. Seed-cones maturing in 2 years, of 2 distinct sizes, with straight peduncle, ovoid, 5–10 mm, blue to blue-black, glaucous, fleshy and resinous, with 2 (–3) seeds. Seeds 2–4 mm.

Distribution

Calif., Idaho, Nev., Oreg., Wash., only in the flora

Discussion

Varieties 2.

Selected References

None.

Key

1 Bark red-brown; seed cones (5-)7.5(-9) mm; plants often (50%) monoecious. Juniperus occidentalis var. occidentalis
1 Bark brown; seed cones (7-)8.5(-10) mm; plants mostly (90%) dioecious. Juniperus occidentalis var. australis
... more about "Juniperus occidentalis"
ovate +  and elliptic +
Acute (?) +  and Obtuse (?) +
Robert P. Adams +
Hooker +
long-lived +
redbrown +  and brown +
exfoliating +
spreading;ascending +
angled +  and terete +
inconspicuous +  and undifferentiated +
Western juniper +
blue +  and blue-black +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
rounded +  and conical +
Calif. +, Idaho +, Nev. +, Oreg. +, Wash. +  and only in the flora +
white +  and yellow +
decurrent +  and scale-like +
petioled +, sessile +, twisted +  and simple +
not overlapping +
persisting +
3 (?) +  and 5 (?) +
rounded +  and scale-like +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
denticulate +
spheric;oblong +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Fl. Bor.-Amer. +
fibrous;woody +
peltate +  and complex +
cuneate +  and oblong +
fleshy +  and woody +
overlapping +
persistent +
coalesced +
fibrous +  and obscurely woody +
1 +  and 2 +
round +  and faceted +
flattened +
Juniperus occidentalis +
Juniperus sect. Sabina +
species +
flattened +, angled +  and terete +
upright +  and decumbent +
dioecious +  and monoecious +
asymmetric +  and symmetric +