Cylindropuntia ×kelvinensis

(V. E. Grant & K. A. Grant) P. V. Heath

Calyx 4: 142. 1994.

Basionyms: Opuntia kelvinensis V. E. Grant & K. A. Grant Evolution 25: 155, fig. 5. 1971
Treatment appears in FNA Volume 4. Treatment on page 108. Mentioned on page 103, 105, 107, 112.

Trees 1.5–2 m; trunk commonly branched; crown open to compact usually bearing whorled branches. Stem segments often easily dislodged, if terminal, green or purple, 5–13 × 1.8–3 cm; tubercles prominent, broadly oval, 0.7–1.2 (–1.5) cm; areoles obdeltate to rhombic, 4.5–6 × 3–5 mm; wool yellow, aging gray to black. Spines 0–8 (–13) per areole, sometimes with 1–3 bristlelike spines along areole margins at most areoles, usually slightly interlacing with spines of adjacent areoles, yellowish to tan, sometimes with pinkish hue, to redbrown and partially gray coated, aging brown-gray to gray; major abaxial spines angular-flattened, usually reflexed, the longest to 30 mm; major adaxial spines subterete, erect-divergent, the longest to 18 mm; sheaths uniformly whitish or tipped yellow to gold, slightly baggy. Glochids in inconspicuous adaxial crescent, yellow, to 1 mm. Flowers: inner tepals rose to magenta, spatulate, 18–25 (–30) mm, emarginate-apiculate; filaments deep rose; anthers yellow; style white, tinged red-purple distally; stigma lobes white with hint of green. Fruits usually sterile, sometimes forming short chains, yellow-green to yellow, sometimes purplish, 25–45 × 15–22 mm, fleshy, tuberculate, spineless; tubercles progressively longer toward fruit apex; umbilicus 4–7 mm deep; areoles 32–44. Seeds pale-yellow, orbicular to angular or squarish in outline, flattened to warped, 3.5–4 × 3–4 mm, sides with 0–2 large depressions; hilum sometimes pointed; girdle smooth. 2n = 22, 33.


Phenology: Flowering spring (Apr–Jun).
Habitat: Sonoran desert scrub, edges of grasslands, rocky flats and slopes, rolling hills
Elevation: 500-1000 m

Discussion

Selected References

None.

Lower Taxa

None.

angular-flattened +
0 cm0 mm <br />0 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0 cm0 mm <br />0 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
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 +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
32 +  and 44 +
obdeltate +  and rhombic +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Donald J. Pinkava +
(V. E. Grant & K. A. Grant) P. V. Heath +
Opuntia kelvinensis +
proliferating +
flattened +  and cylindric +
open to compact +
500-1000 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 />) +
purplish;yellow-green;yellow +
indehiscent +
persistent +, long +  and deciduous +
25mm;45mm +
tuberculate +
clavate +, cylindric +  and subspheric +
1.5 cm15 mm <br />0.015 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Sonoran desert scrub, edges of grasslands, rocky flats and slopes, rolling hills +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2.5 cm25 mm <br />0.025 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–Jun). +
ridgelike +  and nipple--shaped +
3;2;2;30 +
tuberlike +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
flattened;warped +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
brown-gray +  and gray +
deciduous +  and persistent +
conspicuous +
1 (?) +  and 3 (?) +
flattened +
hard +  and rigid +
decurrent +
winged +  and unsegmented +
tuberculate +  and smooth +
40 cm400 mm <br />0.4 m <br /> (50 cm500 mm <br />0.5 m <br />) +
purple +  and green +
5 cm50 mm <br />0.05 m <br /> (13 cm130 mm <br />0.13 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (3 cm30 mm <br />0.03 m <br />) +
segmented +
woody +  and succulent +
white with hint of green +
tinged red-purple +  and white +
Opuntia sect. Cylindropuntia +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Cylindropuntia ×kelvinensis +
Cylindropuntia +
species +
dull +  and glossy +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
terrestrial;epiphytic or epipetric +
gray to black +  and yellow +