Opuntia polyacantha var. polyacantha

IllustratedEndemic
Synonyms: Opuntia heacockiae G. Arp Opuntia juniper ina Britton & Rose Opuntia polyacantha var. juniperina (Engelmann & J. M. Bigelow) L. D. Benson Opuntia polyacantha var. rufispina (Engelmann) J. M. Coulter Opuntia polyacantha var. trichophora Opuntia trichophora
Treatment appears in FNA Volume 4. Treatment on page 147. Mentioned on page 144.

Stem segments broadly obovate to circular, (4–) 8.5–12 × (4–) 5.5–11 cm; areoles 6–11 per diagonal row across midstem segment, 6–13 mm apart. Spines in most areoles, of 2 kinds: major spines (0–) 1–3 (–5) per areole, ± deflexed to reflexed or porrect at stem segment apex, yellowbrown to gray, 20–35 (–40) mm; minor spines 0–5 per areole, deflexed, white, 5–10 (–16) mm, sometimes spines of basal and near basal areoles long, flexible, curling. Fruits stout; areoles 12–28, most bearing (4–) 6–15 spines, 5–10 mm. 2n = 22, 44.


Phenology: Flowering late spring.
Habitat: Grasslands, pinyon-juniper woodlands, clay, sandy or gravelly soils
Elevation: 500-2000(-2800) m

Distribution

V4 284-distribution-map.gif

Alta., Sask., Ariz., Colo., Idaho, Kans., Mont., Nebr., Nev., N.Mex., N.Dak., Okla., S.Dak., Tex., Utah, Wyo.

Discussion

The morphotype, usually called Opuntia trichophora, has additional, curly, hairlike spines from areoles on older stem segments, but these plants occur sporadically throughout the range of O. polyacantha var. polyacantha from New Mexico to Wyoming.

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 />) +
12 +  and 28 +
subcircular +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Donald J. Pinkava +
Haworth +
Cactus ferox +
proliferating +
flattened +  and cylindric +
Alta. +, Sask. +, Ariz. +, Colo. +, Idaho +, Kans. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Okla. +, S.Dak. +, Tex. +, Utah +  and Wyo. +
500-2000(-2800) 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 +
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 +
Grasslands, pinyon-juniper woodlands, clay, sandy or gravelly soils +
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 +
1 cm10 mm <br />0.01 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 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 +
Suppl. Pl. Succ., +
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 />) +
Illustrated +  and Endemic +
3.5 cm35 mm <br />0.035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
yellowbrown +  and gray +
deciduous +  and persistent +
less deflexed +  and reflexed or porrect +
conspicuous +
with hairlike bristles +  and setose +
6 (?) +  and 15 (?) +
acicular +, terete +  and flattened +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
hard +  and rigid +
decurrent +
winged +  and unsegmented +
tuberculate +  and smooth +
4 cm40 mm <br />0.04 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
8.5 cm85 mm <br />0.085 m <br /> (12 cm120 mm <br />0.12 m <br />) +
pubescent +  and glabrous +
5.5 cm55 mm <br />0.055 m <br /> (11 cm110 mm <br />0.11 m <br />) +
segmented +
woody +  and succulent +
white +  and pale-pink +
Opuntia heacockiae +, Opuntia juniper +, Opuntia polyacantha var. juniperina +, Opuntia polyacantha var. rufispina +, Opuntia polyacantha var. trichophora +  and Opuntia trichophora +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Opuntia polyacantha var. polyacantha +
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 +