Leucophyllum candidum

I. M. Johnston

J. Arnold Arbor. 22: 120. 1941.

Common names: Brewster County barometer-bush
Synonyms: Leucophyllum violaceum Pennell
Treatment appears in FNA Volume 17. Treatment on page 333.

Shrubs erect, not intricately branched, rounded, 3–10 (–15) dm, not appearing thorny. Young stems irregularly canescent-tomentose, hairs conic to cylindric, dendritic, uneven in height. Leaves alternate or subopposite, sometimes opposite near stem apices; petiole 1–3 (–6) mm; blade broadly obovate to obovate-orbiculate, reniform, or ovate, 6–10 (–16) mm, base rounded to cuneate, veins not prominently raised abaxially, surfaces densely equally silvery-gray-tomentose or irregularly canescent-tomentose, hairs conic to cylindric, dendritic, uneven in height. Flowers: calyx lobes oblong to oblong-lanceolate, 2.5–5 (–6) mm; corolla dark to light violet-purple, campanulate, (10–) 12–22 (–25) mm, tube not notably narrowed. 2n = 68.


Phenology: Flowering (Apr–)May–Sep.
Habitat: Limestone hills, canyons, steep slopes, gravelly slopes, flats, roadsides.
Elevation: 600–1200 m.

Distribution

Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango), Mexico (Zacatecas)

Discussion

Leucophyllum candidum is known in the flora area only from Brewster County.

Selected References

None.

Lower Taxa

None.

... more about "Leucophyllum candidum"
funnelform-campanulate +
slightly smaller +
James Henrickson +  and Guy L. Nesom +
I. M. Johnston +
rounded +  and cuneate +
1 cm10 mm <br />0.01 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
broadly obovate;obovate-orbiculate reniform or ovate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not +, leathery +  and fleshy +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
campanulate +
alternate;opposite or subopposite +
Brewster County barometer-bush +
bilabiate +, regular +  and symmetric +
2.2 cm22 mm <br />0.022 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
dark +  and light violet-purple +
1.2 cm12 mm <br />0.012 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Durango) +  and Mexico (Zacatecas) +
600–1200 m. +
curved +  and straight +
not +  and abundant +
pilose +  and glabrous +
loculicidal +  and septicidal +
Limestone hills, canyons, steep slopes, gravelly slopes, flats, roadsides. +
appressed-stellate +
glabrescent +
conic;cylindric +
subopposite +  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 /> (0.6 cm6 mm <br />0.006 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering (Apr–)May–Sep. +
J. Arnold Arbor. +
connate +  and distinct +
1/4 (?) +  and 1/3 (?) +
canescent-tomentose +  and silvery-gray-tomentose +
Leucophyllum violaceum +
Leucophyllum candidum +
Leucophyllum +
species +
narrowed +
not thorny +  and branched +
perennial +, biennial +  and annual +