Juniperus flaccida var. flaccida

Schlechtendal
Treatment appears in FNA Volume 2.

Trees dioecious, to 12 m, single-stemmed to 1–2 m; crown globose. Bark cinnamon to reddish-brown or gray to reddish-brown, exfoliating in broad interlaced fibrous strips, that of small branchlets (5–10 mm diam.) smooth, that of larger branchlets exfoliating in wide strips or plates. Branches drooping; branchlets flaccid, 3–4-sided in cross-section, ca. 2/3 or less as wide as length of scalelike leaves. Leaves green, abaxial gland variable, elongate, conspicuous, exudate absent, margins appearing entire at 20× but with irregular teeth at 40×; whip leaves 4–6 mm, not glaucous adaxially; scalelike leaves 1.5–2 mm, overlapping by 1/4–1/5 their length, apex rounded to acuminate, spreading. Seed-cones maturing in 1 year, of 1 size, with straight to curved peduncles, globose, 9–20 mm, tan-brown to brownish purple when mature, glaucous, obscurely woody, with (4–) 6–10 (–13) seeds. Seeds 5–6 mm.


Habitat: Rocky soils and slopes
Elevation: 900–2900 m

Discussion

This variety is found in Big Bend National Park, Texas. It is abundant in Mexico, where two additional varieties occur: var. poblana Martínez and var. martinezii (Pérez de la Rosa) Silba.

Selected References

None.

Lower Taxa

None.

Robert P. Adams +
Schlechtendal +
long-lived +
cinnamon +  and reddish-brown or gray +
exfoliating +
angled +  and terete +
inconspicuous +  and undifferentiated +
tan-brown +  and brownish purple +
0.9 cm9 mm <br />0.009 m <br /> (2 cm20 mm <br />0.02 m <br />) +
globose +
Tex. +  and Mexico +
900–2900 m +
Rocky soils and slopes +
decurrent +  and scale-like +
petioled +, sessile +, twisted +  and simple +
persisting +
overlapping +
3 (?) +  and 5 (?) +
scale-like +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
straight +  and curved +
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 +
6 +  and 10 +
round +  and faceted +
flattened +
Juniperus flaccida var. flaccida +
Juniperus flaccida +
variety +
flattened +, angled +  and terete +
upright +  and decumbent +
asymmetric +  and symmetric +