Leucophyllum minus

A. Gray in W. H. Emory

Rep. U.S. Mex. Bound. 2(1): 115. 1859.

Common names: Big Bend barometer-bush or silver-leaf
Treatment appears in FNA Volume 17. Treatment on page 333.

Shrubs erect, intricately branched, compact, 2–8 (–15) dm, often appearing thorny. Young stems densely and evenly silvery stellate, hairs closely and tightly appressed, overlapping, appearing stellate, actually compressed-dendritic with radii extending from multiple levels, typically with one series of radii at tip. Leaves alternate, crowded in axillary fascicles or on compressed lateral shoots; petiole (0.5–) 1–3 (–4) mm; blade oblanceolate or spatulate to obovate-orbiculate, (2–) 3–10 (–16) mm, base cuneate-attenuate, surfaces equally silvery gray, hairs stellate, closely and tightly appressed, overlapping. Flowers: calyx lobes linear to oblong-lanceolate, (2–) 3–4.5 mm; corolla lavender to purple or blue, rarely white, campanulate, (12–) 18–25 mm, abruptly ampliate distal to narrow tube. 2n = 34.


Phenology: Flowering (May–)Jun–Aug(–Nov).
Habitat: Limestone ridges, slopes, and ledges, gravel, clayey, sandy hills, gravelly washes.
Elevation: 900–1700 m.

Distribution

N.Mex., Tex., Mexico (Chihuahua), Mexico (Coahuila)

Discussion

In Texas, Leucophyllum minus is known from the Big Bend region westward through the Trans-Pecos.

Selected References

None.

Lower Taxa

None.

... more about "Leucophyllum minus"
funnelform-campanulate +
slightly smaller +
James Henrickson +  and Guy L. Nesom +
A. Gray in W. H. Emory +
cuneate-attenuate +
1 cm10 mm <br />0.01 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
spatulate;obovate-orbiculate +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not +, leathery +  and fleshy +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
campanulate +
alternate;opposite or subopposite +
Big Bend barometer-bush or silver-leaf +
bilabiate +, regular +  and symmetric +
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
white +, lavender +  and purple or blue +
ampliate +
1.8 cm18 mm <br />0.018 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
N.Mex. +, Tex. +, Mexico (Chihuahua) +  and Mexico (Coahuila) +
900–1700 m. +
curved +  and straight +
not +  and abundant +
pilose +  and glabrous +
loculicidal +  and septicidal +
Limestone ridges, slopes, and ledges, gravel, clayey, sandy hills, gravelly washes. +
overlapping +
glabrescent +
conic;cylindric +
crowded +  and alternate +
persistent +
cauline +  and basal +
linear +  and oblong-lanceolate or oblong +
slightly smaller +
tenuinucellate +, unitegmic +  and hemitropous +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering (May–)Jun–Aug(–Nov). +
Rep. U.S. Mex. Bound. +
compressed-dendritic +
connate +  and distinct +
1/4 (?) +  and 1/3 (?) +
silvery gray +
Leucophyllum minus +
Leucophyllum +
species +
thorny +  and branched +
perennial +, biennial +  and annual +