Echinocereus chisosensis

W. T. Marshall

Cact. Succ. J. (Los Angeles) 12: 15, cover, plate 1. 1940.

Common names: Chisos Mountains hedgehog cactus
EndemicConservation concern
Synonyms: Echinocereus reichenbachii var. chisosensis (W. T. Marshall) L. D. Benson
Treatment appears in FNA Volume 4. Mentioned on page 172.

Plants inconspicuous, unbranched or forming small lax clumps. Stems erect or ascending, short cylindric, 12.5–20 (–30) × 3–5 cm; ribs (10–) 13–16, crests strongly undulate; areoles 5–8.5 mm apart. Spines 11–20 per areole, straight, white, pinkish gray, pale-pink, dark-brown, or purplish black, tipped brown, central spines darkest (sometimes with annual rings of ± contrasting spine color); radial spines 10–17 per areole, 5–20 mm; central spines (1–) 2 (–6) per areole, appressed to slightly projecting or spreading, terete, 3.5–17 mm. Flowers 6–9.5 × 5–7 cm; flower tube 10–30 mm; flower tube hairs 3–5 (–10) mm; inner tepals white proximally, with basal marks crimson or maroon, bright-rose-pink distally, 1.8–5 × 5–16 mm, tips relatively thin and delicate; anthers yellow; nectar chamber 1–2 mm. Fruits green, 15– 35 mm, pulp white. 2n = 22.


Phenology: Flowering Mar–May; fruiting 2 months after flowering.
Habitat: Chihuahuan Desert, usually sheltered by low, perennial vegetation, desert scrub, gravelly alluvium, bajadas
Elevation: 600-900 m

Discussion

Of conservation concern.

Echinocereus fobeanus Oehme, of Mexico, sometimes has been considered a variety of E. chisosensis. Both species seem to be relicts and rare.

Echinocereus chisosensis is in the Center for Plant Conservation’s Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Echinocereus chisosensis"
cushionlike +
circular to linear +
deciduous +  and persistent +
hourglass--shaped +
0.5 cm5 mm <br />0.005 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
W. T. Marshall +
hardened +
maroon +  and crimson +
triangular +
curved +  and straight +
appressed +  and slightly projecting or spreading +
0.35 cm3.5 mm <br />0.0035 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
proliferating +
flattened +  and cylindric +
Chisos Mountains hedgehog cactus +
mucilaginous +
undulate +
600-900 m +
not separating +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
6 cm60 mm <br />0.06 m <br /> (9.5 cm95 mm <br />0.095 m <br />) +
unisexual +  and bisexual +
2.6 cm26 mm <br />0.026 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dehiscent +  and indehiscent +
persistent +, long +  and deciduous +
spheric +  and narrowly obovoid +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Chihuahuan Desert, usually sheltered by low, perennial vegetation, desert scrub, gravelly alluvium, bajadas +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
deciduous +  and persistent +
rudimentary +
flat +  and terete +
nearly +  and microscopic +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
tuberculate +
fluted;spheric;depressed-spheric or club-shaped +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
smooth +  and tuberculate +
deciduous +  and persistent +
Flowering Mar–May +  and fruiting 2 months after flowering. +
mucilaginous +
ridgelike +  and nipple--shaped +
Cact. Succ. J. (Los Angeles) +
triangular +
arillate +  and strophiolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
rugose +  and tuberculate +
spheric;obovoid +
tuberculate +
Endemic +  and Conservation concern +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
tipped brown +, purplish black +, dark-brown +, pale-pink +, pinkish gray +  and white +
straight +
deciduous +
3mm +  and 150mm +
10 (?) +  and 17 (?) +
roughened +  and smooth +
acicular +  and subulate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
decurrent +
unsegmented +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
yellow-green +  and dark green +
12.5cm;20cm +
ascending;erect +
cylindric +
0 cm0 mm <br />0 m <br /> (40 cm400 mm <br />0.4 m <br />) +
succulent +
3cm;5cm +
yellowish green +  and green +
tuberculate +
Echinocereus reichenbachii var. chisosensis +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Echinocereus chisosensis +
Echinocereus +
species +
dull +  and glossy +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
forming small lax clumps +  and unbranched +
epiphytic;epiphytic;epiphytic +
decumbent +, pendent +, sprawling +, ascending +  and erect +
barrel-shaped +  and spheric +