Opuntia polyacantha var. arenaria

(Engelmann) B. D. Parfitt

Cact. Succ. J. (Los Angeles) 70: 188. 1998.

Common names: Sand pricklypear
Conservation concern
Basionym: Opuntia arenaria Engelmann Proc. Amer. Acad. Arts 3: 301. 1856
Treatment appears in FNA Volume 4. Treatment on page 147.

Stem segments narrowly obovate, 4–7 × 2–3 (–5) cm; areoles 4–6 per diagonal row across midstem segment, 8–11 mm apart. Spines in most areoles, of 2 kinds: major spines 1–3 per areole, only in distal 3–9 areoles, reflexed to porrect, brown, longest 20–40 mm; minor spines 5–7 per areole, strongly deflexed, white, 4–7 mm, except middle one to 14 mm. Fruits slender; areoles 10–14, bearing 3–6 spines, to 8 mm. 2n = 22.


Phenology: Flowering late spring.
Habitat: Sandy barren areas, small dunes
Elevation: 1000-1300 m

Distribution

V4 285-distribution-map.gif

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

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.

"longest" is not a number.

cushionlike +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
deciduous +  and persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
10 +  and 14 +
subcircular +
0 cm0 mm <br />0 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Donald J. Pinkava +
(Engelmann) B. D. Parfitt +
Opuntia arenaria +
proliferating +
flattened +  and cylindric +
Sand pricklypear +
N.Mex. +, Tex. +  and Mexico (Chihuahua) +
1000-1300 m +
red +  and magenta +
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 />) +
spineless +  and stipitate +
straight +
indehiscent +
persistent +, long +  and deciduous +
15mm;45mm +
proliferating +
tuberculate +  and smooth +
cylindric +
slender +
fleshy +  and juicy or dry +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
inconspicuous +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
foveolate +  and reticulate +
Sandy barren areas, small dunes +
oblong +  and spatulate +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 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 +
tinged color +
0.1 cm1 mm <br />0.001 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
open +  and simple +
sometimes covered by outgrowths of proximal portion of style base or of flower tube wall +  and open +
persistent +  and deciduous +
Flowering late spring. +
ridgelike +  and nipple--shaped +
Cact. Succ. J. (Los Angeles) +
3;2;2;30 +
tuberlike +
Tan (?) +  and Gray (?) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
oblong;subcircular +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Conservation concern +
7.5 cm75 mm <br />0.075 m <br /> (17 cm170 mm <br />0.17 m <br />) +
straight +  and curling +
deciduous +  and persistent +
reflexed +  and porrect +
conspicuous +
with hairlike bristles +  and setose +
3 (?) +  and 6 (?) +
acicular +, terete +  and flattened +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
hard +  and rigid +
decurrent +
winged +  and unsegmented +
tuberculate +  and smooth +
60 cm600 mm <br />0.6 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
pubescent +  and glabrous +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
segmented +
woody +  and succulent +
white +  and pale-pink +
Tunas polyacantha +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Opuntia polyacantha var. arenaria +
Opuntia polyacantha +
variety +
dull +  and glossy +
yellow +  and paler +
segmented +
crescent +
9 cm90 mm <br />0.09 m <br /> (18.5 cm185 mm <br />0.185 m <br />) +
pink-gray;gray-brown +
straight +  and curling +
ascending +  and deflexed +
2 (?) +, 0 (?) +  and 18 (?) +
4 cm40 mm <br />0.04 m <br /> (9 cm90 mm <br />0.09 m <br />) +
terrestrial;epiphytic or epipetric +
erect +  and trailing +
tan +  and brown +