Juniperus coahuilensis

(Martinez) Gaussen ex R. P. Adams

Phytologia 74: 450. 1993.

Common names: Roseberry
Basionyms: Juniperus erythrocarpa var. coahuilensis Martinez Anales Inst. Biol. Univ. Nac. México 17: 115–116. 1946
Treatment appears in FNA Volume 2.

Shrubs or trees dioecious, to 8 m, single-stemmed to 1 m or branched at base; crown flattened-globose to irregular to round. Bark gray to brown, exfoliating in long ragged strips, that of small branchlets (5–10 mm diam.) smooth, that of larger branchlets exfoliating in strips, or occasionally in flakes. Branches spreading to ascending; branchlets erect, 3–4-sided in cross-section, ca. 2/3 as wide as length of scalelike leaves. Leaves green to light green, abaxial glands elliptic to ovate, at least 1/4 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, spreading. Seed-cones maturing in 1 year, of 1 size, with straight peduncles, globose to ovoid, 6–7 mm, rose to pinkish but yellow-orange, orange, or dark red beneath glaucous coating, fleshy and somewhat sweet, with 1 (–2) seeds. Seeds 4–5 mm.


Habitat: Bouteloua grasslands and adjacent rocky slopes
Elevation: 980–1600(–2200) m

Distribution

V2 49-distribution-map.gif

Ariz., N.Mex., Tex., Mexico

Discussion

Roseberry juniper is unusual in that it sprouts from the stump after burning or cutting. Hybridization with Juniperus pinchotii occurs in Big Bend National Park, Texas (R. P. Adams and J. R. Kistler 1991), and possibly near Saltillo, Mexico. Reports of hybridization with J. ashei have been refuted (R. P. Adams 1975).

Selected References

None.

Lower Taxa

None.

... more about "Juniperus coahuilensis"
not +  and visible +
elliptic +  and ovate +
Acute (?) +  and Keeled (?) +
Robert P. Adams +
(Martinez) Gaussen ex R. P. Adams +
long-lived +
gray +  and brown +
exfoliating +
Juniperus erythrocarpa var. coahuilensis +
spreading;ascending +
angled +  and terete +
inconspicuous +  and undifferentiated +
Roseberry +
rose +  and pinkish but yellow-orange punct orange or dark red +
rose +  and pinkish but yellow-orange punct orange or dark red +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
globose +  and ovoid +
round +  and flattened-globose +
Ariz. +, N.Mex. +, Tex. +  and Mexico +
980–1600(–2200) m +
white crystalline +
Bouteloua grasslands and adjacent rocky slopes +
decurrent +  and scale-like +
petioled +, sessile +, twisted +  and simple +
if so , by 0-1/4 their length , keeled , apex +  and not overlapping +
green +  and light green +
persisting +
3 (?) +  and 5 (?) +
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 +
flattened +
Juniperus coahuilensis +
Juniperus sect. Sabina +
species +
flattened +, angled +  and terete +
branched +  and single-stemmed +
tree +  and shrub +
upright +  and decumbent +
asymmetric +  and symmetric +