Grusonia emoryi

(Engelmann) Pinkava

J. Arizona-Nevada Acad. Sci. 32: 50. 1999.

Common names: Devil club-cholla
Illustrated
Basionyms: Opuntia emoryi Engelmann Proc. Amer. Acad. Arts 3: 303. 1856
Synonyms: Corynopuntia stanlyi (Engelmann ex B. D. Jackson) F. M. Knuth Grusonia stanlyi (Engelmann ex B. D. Jackson) H. Robinson Opuntia stanlyi Engelmann ex B. D. Jackson
Treatment appears in FNA Volume 4. Treatment on page 120. Mentioned on page 119.

Shrubs, forming mats, 15–30 cm. Roots diffuse. Stem segments curved-clavate, gradually to abruptly narrowed at base, 7–19 × 2.5–5 cm; tubercles very prominent, 20–50 mm, 1–3.5 times longer than wide, not or little obscured by spines; areoles 4–6 mm in diam.; wool white to gray. Spines 12–30 per areole, mostly in apical areoles to ± uniformly distributed along stems (in northern populations), spreading, yellow, tan, or redbrown, tipped yellow, longest 3–7 cm; major 3–5 abaxial spines divergent, yellowish or redbrown, angular-flattened, sharp-edged; major (1–) 3–5 adaxial spines ascending-divergent, tan or redbrown, angular-flattened to subterete. Glochids adaxial in areole, yellow to brown, 5–7 mm. Flowers: inner tepals yellow, 20–30 mm; filaments yellow to reddish; style cream; stigma lobes cream or tinged pink. Fruits yellow, cylindric to ellipsoid, 40–90 × 14–40 mm, fleshy, spineless (rarely with few very short spines) but usually densely yellow glochidiate; areoles 30–45. Seeds yellowish white to yellow, 5–6 × 3.5–4 mm, smooth. 2n = 44.


Phenology: Flowering late spring (May–Jun).
Habitat: Chihuahuan and Sonoran deserts, sandy or gravelly desert flats, washes, hills
Elevation: 700-1200 m

Distribution

V4 232-distribution-map.gif

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

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Grusonia emoryi"
redbrown +  and yellowish +
angular-flattened +
ascending-divergent +
redbrown +  and tan +
cushionlike +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
deciduous +  and persistent +
30 +  and 45 +
cushionlike +
Donald J. Pinkava +
(Engelmann) Pinkava +
curving +
dislodged +
cylindric-clavate +
Opuntia emoryi +
proliferating +
flattened +  and cylindric +
Devil club-cholla +
Ariz. +, N.Mex. +, Tex. +  and Mexico (Chihuahua) +
700-1200 m +
yellow +  and reddish +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (15 cm150 mm <br />0.15 m <br />) +
yellow;yellow +
indehiscent +
persistent +, long +  and deciduous +
40mm;90mm +
glochidiate +
cylindric +  and ellipsoid +
1.4 cm14 mm <br />0.014 m <br /> (4 cm40 mm <br />0.04 m <br />) +
not protruding +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Chihuahuan and Sonoran deserts, sandy or gravelly desert flats, washes, hills +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
deciduous +
flattened +  and conic +
0 cm0 mm <br />0 m <br /> (3 cm30 mm <br />0.03 m <br />) +
succulent +
tuberculate +
fluted;spheric;depressed-spheric or club-shaped +
sometimes covered by outgrowths of proximal portion of style base or of flower tube wall +  and open +
persistent +  and deciduous +
Flowering late spring (May–Jun). +
ridgelike +  and nipple--shaped +
J. Arizona-Nevada Acad. Sci. +
3;2;2;30 +
adventitious +
tuberlike +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
pubescent +  and glabrous +
flattened;suborbicular +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Illustrated +
tipped yellow +, redbrown +, tan +  and yellow +
deciduous +  and persistent +
conspicuous +
12 (?) +  and 30 (?) +
terete +  and strongly flattened +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
hard +  and rigid +
decurrent +
winged +  and unsegmented +
tuberculate +  and smooth +
7 cm70 mm <br />0.07 m <br /> (19 cm190 mm <br />0.19 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
segmented +
woody +  and succulent +
tinged pink +  and cream +
Corynopuntia stanlyi +, Grusonia stanlyi +  and Opuntia stanlyi +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Grusonia emoryi +
Grusonia +
species +
dull +  and glossy +
not obscured +  and prominent +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
conspicuous +
terrestrial;epiphytic or epipetric +
trailing +  and erect +
white +  and gray +