Opuntia engelmannii var. flavispina

(L. D. Benson) B. D. Parfitt & Pinkava

Madroño 35: 348. 1988.

Basionym: Opuntia phaeacantha var. flavispina L. D. Benson Cact. Succ. J. (Los Angeles) 46: 79. 1974
Treatment appears in FNA Volume 4. Treatment on page 136. Mentioned on page 135.

Stem segments obovate, 15–23 × 14–18 cm, to 1.5 times longer than wide. Spines (0–) 1–7 per areole, evenly distributed on stem segments, arching downward, yellow with extreme reddish-brown basal portions, aging deep red to black, often twisted, the longest 65–75 mm, smaller ones depressed, whitish. 2n = 66.


Phenology: Flowering spring (Apr–May).
Habitat: Sonoran Desert, sandy bajadas
Elevation: 500-800 m

Discussion

Selected References

None.

Lower Taxa

None.
40 cm400 mm <br />0.4 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
glaucous +  and glabrous +
tuberculate +
10cm;40cm +
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 +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
20 +  and 32 +
subcircular +  and obovate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Donald J. Pinkava +
(L. D. Benson) B. D. Parfitt & Pinkava +
Opuntia phaeacantha var. flavispina +
proliferating +
flattened +  and cylindric +
Ariz. +  and Mexico (Sonora) +
500-800 m +
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 +
burlike +  and spiny +
dark red;purple +
straight +
indehiscent +
persistent +, long +  and deciduous +
35mm;90mm +
proliferating +
tuberculate +  and smooth +
ovate-elongate +  and barrel-shaped +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
scattered +  and spaced +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
foveolate +  and reticulate +
Sonoran Desert, sandy bajadas +
oblong +  and spatulate +
3 cm30 mm <br />0.03 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 +
open +  and simple +
sometimes covered by outgrowths of proximal portion of style base or of flower tube wall +  and open +
persistent +  and deciduous +
Flowering spring (Apr–May). +
ridgelike +  and nipple--shaped +
3;2;2;30 +
tuberlike +
Tan (?) +  and Grayish (?) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
flattened;subcircular;deltoid +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
distributed +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
whitish +, red +  and black +
straight +  and curved +
deciduous +  and persistent +
downward +  and arching +
conspicuous +
with hairlike bristles +  and setose +
1 (?) +  and 7 (?) +
depressed +
6.5 cm65 mm <br />0.065 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
hard +  and rigid +
decurrent +
winged +  and unsegmented +
tuberculate +  and smooth +
not disarticulating +
60 cm600 mm <br />0.6 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
yellow-green +  and blue-green +
15 cm150 mm <br />0.15 m <br /> (23 cm230 mm <br />0.23 m <br />) +
pubescent +  and glabrous +
nearly smooth +  and tuberculate +
14 cm140 mm <br />0.14 m <br /> (18 cm180 mm <br />0.18 m <br />) +
segmented +
woody +  and succulent +
yellow-green +  and green +
whitish +  and cream +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Opuntia engelmannii var. flavispina +
Opuntia engelmannii +
variety +
dull +  and glossy +
yellow +  and paler +
segmented +
tree +  and shrub +
terrestrial;epiphytic or epipetric +
spreading to sometimes +
blackish +  and tawny +