Juniperus monosperma

(Engelmann) Sargent

Silva 10: 89. 1896.

Common names: One-seed juniper sabina
IllustratedEndemic
Basionyms: Juniperus occidentalis var. monosperma Engelmann Trans. Acad. Sci. St. Louis 3: 590. 1878
Treatment appears in FNA Volume 2.

Shrubs or trees dioecious, to 7 (–12) m, usually branching near base; crown rounded to flattened-globose. Bark gray to brown, exfoliating in thin strips, that of small branchlets (5–10 mm diam.) smooth, that of larger branchlets exfoliating in either flakes or in strips. Branches ascending to erect; branchlets erect, 4–6-sided, ca. 2/3 as wide as length of scalelike leaves. Leaves green to dark green, abaxial glands elongate, fewer than 1/5 of glands (on whip leaves) with an evident white crystalline exudate, margins denticulate (at 20×); whip leaves 4–6 mm, glaucous adaxially; scalelike leaves 1–3 mm, not overlapping, or if so, by less than 1/4 their length, keeled, apex acute to acuminate, spreading. Seed-cones maturing in 1 year, of 1 size, with straight peduncles, globose to ovoid, 6–8 mm, reddish blue to brownish blue, glaucous, fleshy and resinous, with 1 (–3) seeds. Seeds 4–5 mm.


Habitat: Dry, rocky soils and slopes
Elevation: 1000–2300 m

Distribution

V2 436-distribution-map.gif

Ariz., Colo., N.Mex., Okla., Tex.

Discussion

Reports of hybridization with J. pinchotii have been refuted by use of numerous chemical and morphologic characters (R. P. Adams 1975); the two species have nonoverlapping pollination seasons.

Selected References

None.

Lower Taxa

None.

... more about "Juniperus monosperma"
not +  and visible +
Acute (?) +  and Acuminate (?) +
Robert P. Adams +
(Engelmann) Sargent +
long-lived +
gray +  and brown +
exfoliating +
Juniperus occidentalis var. monosperma +
ascending;erect +
angled +  and terete +
inconspicuous +  and undifferentiated +
One-seed juniper +  and sabina +
reddish blue +  and brownish blue +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
globose +  and ovoid +
rounded +  and flattened-globose +
Ariz. +, Colo. +, N.Mex. +, Okla. +  and Tex. +
1000–2300 m +
white crystalline +
Dry, rocky soils and slopes +
decurrent +  and scale-like +
petioled +, sessile +, twisted +  and simple +
not overlapping +
green +  and dark green +
persisting +
3 (?) +  and 5 (?) +
keeled +  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 />) +
fibrous;woody +
peltate +  and complex +
cuneate +  and oblong +
fleshy +  and woody +
overlapping +
persistent +
coalesced +
fibrous +  and obscurely woody +
1 +  and 2 +
round +  and faceted +
Illustrated +  and Endemic +
flattened +
Juniperus monosperma +
Juniperus sect. Sabina +
species +
flattened +, angled +  and terete +
tree +  and shrub +
upright +  and decumbent +
asymmetric +  and symmetric +