Cylindropuntia imbricata var. argentea

(M. S. Anthony) Backeberg

Cactaceae 1: 195. 1958.

EndemicConservation concern
Basionym: Opuntia imbricata var. argentea M. S. Anthony Amer. Midl. Naturalist 55: 236, fig. 7. 1956
Treatment appears in FNA Volume 4. Treatment on page 113. Mentioned on page 112.

Shrubs, densely branched, to 1.2 m. Stem segments 10–20 cm; tubercles close-set. Spines and sheaths silvery. 2n = 22.


Phenology: Flowering spring (Apr).
Habitat: Chi-huahuan desert scrub with lechuguilla and sotol, rocky limestone slopes, flats, ridges
Elevation: 600-700 m

Discussion

Of conservation concern.

Cylindropuntia imbricata var. argentea is a narrow endemic within the Big Bend region, Texas.

Selected References

None.

Lower Taxa

None.
cushionlike +
gray +  and tan +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
deciduous +  and persistent +
18 +  and 30 +
obdeltate +  and rhombic +
Donald J. Pinkava +
(M. S. Anthony) Backeberg +
Opuntia imbricata var. argentea +
proliferating +
flattened +  and cylindric +
600-700 m +
pink +  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 />) +
indehiscent +
persistent +, long +  and deciduous +
24mm;45mm +
not proliferating +
tuberculate +
obovoid +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
with low marginal ridge +  and smooth +
not protruding +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Chi-huahuan desert scrub with lechuguilla and sotol, rocky limestone slopes, flats, ridges +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 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 +
sometimes covered by outgrowths of proximal portion of style base or of flower tube wall +  and open +
persistent +  and deciduous +
Flowering spring (Apr). +
ridgelike +  and nipple--shaped +
3;2;2;30 +
tuberlike +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
warped;subcircular;angled +
yellow-tipped +
smooth;slightly lumpy +
Endemic +  and Conservation concern +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
curved +  and straight +
deciduous +  and persistent +
not spreading +
conspicuous +
8 (?) +  and 15 (?) +
flattened +  and terete +
0.8 cm8 mm <br />0.008 m <br /> (3 cm30 mm <br />0.03 m <br />) +
hard +  and rigid +
decurrent +
winged +  and unsegmented +
tuberculate +  and smooth +
subwhorled +  and whorled +
40 cm400 mm <br />0.4 m <br /> (50 cm500 mm <br />0.5 m <br />) +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
segmented +
woody +  and succulent +
cream +  and green +
light green basally or pink +  and red-magenta +
Opuntia imbricata +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Cylindropuntia imbricata var. argentea +
Cylindropuntia imbricata +
variety +
dull +  and glossy +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
terrestrial;epiphytic or epipetric +
gray +  and black +