Opuntia ×curvispina

Griffiths

Bull. Torrey Bot. Club 43: 88, plate 2. 1916.

Treatment appears in FNA Volume 4. Treatment on page 139. Mentioned on page 129, 133.

Trees, shrubby, 0.5–1.5 m, with trunk to 20 cm. Stem segments not disarticulating, gray-green to yellow-green, flattened, circular to broadly obovate, 12–22 × 12.5–20 cm, sometimes wider than long, ± tuberculate, glabrous; areoles 6–9 per diagonal row across midstem segment, prominent, circular to elliptic, 4–7 × 3–7 mm; wool tan to brown, aging gray. Spines in most areoles, reddish yellow to redbrown; abaxial ones sometimes whitish; adaxial spines often yellow; major spines (0–) 4–8 (–9) per areole, usually deflexed, sometimes spreading, particularly on stem segment margins, subterete to flattened or channeled adaxially, sometimes curved, stiff, the longest 40–60 mm. Glochids crowded in extended marginal crescent, nearly encircling areole, and less dense subapical tuft obscured by long dense wool, yellow to yellowbrown, 1–6 (–12) mm. Flowers: inner tepals yellow sometimes with faint basal reddish blush, broadly obovate, 22–35 mm, apiculate; filaments and anthers yellow; style white; stigma lobes greenish white. Fruits dull red with greenish flesh, ovate to obovate, 32–50 × 15–30 mm, fleshy, glabrous, spineless; umbilicus 4–6 mm deep; areoles 28–46. Seeds yellowish, reniform to subcircular, 4–5 mm diam., sides flattened, smooth; girdle protruding 0.5–0.8 mm. 2n = 22.


Phenology: Flowering spring (Apr–Jun).
Habitat: Desert grasslands, oak and/or juniper woodlands, sandy to gravelly flats or slopes
Elevation: 1000-1500 m

Discussion

Opuntia ×curvispina is a nothospecies resulting from hybridization of O. chlorotica and O. phaeacantha. B. D. Parfitt (1980) separated the tetraploid Opuntia martiniana (L. D. Benson) B. D. Parfitt [O. littoralis Engelmann var. martiniana (L. D. Benson) L. D. Benson] from O. ×curvispina on the basis of having style obovoid (widest at or above the middle) versus ovoid (widest near the base) and other differences, often overlapping, such as more yellow spines, fewer areoles per stem segment, and size differences of fruit. Because both are tetraploid putative hybrids, grow in proximity, and share many character states, I am reluctant to separate them until more evidence is obtained.

Selected References

None.

Lower Taxa

None.

No values specified.

... more about "Opuntia ×curvispina"
cushionlike +
circular +  and elliptic +
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 />) +
28 +  and 46 +
obovate +  and circular +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Donald J. Pinkava +
Griffiths +
proliferating +
flattened +  and cylindric +
Ariz. +, Calif. +  and Nev. +
1000-1500 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 />) +
burlike +  and spiny +
straight +
indehiscent +
persistent +, long +  and deciduous +
32mm;50mm +
proliferating +
tuberculate +  and smooth +
ovate +  and obovate +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
foveolate +  and reticulate +
Desert grasslands, oak and/or juniper woodlands, sandy to gravelly flats or slopes +
2.2 cm22 mm <br />0.022 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 +
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–Jun). +
ridgelike +  and nipple--shaped +
Bull. Torrey Bot. Club +
3;2;2;30 +
tuberlike +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
reniform;subcircular +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
flattened +
not sheathed +
7.5 cm75 mm <br />0.075 m <br /> (17 cm170 mm <br />0.17 m <br />) +
reddish yellow +  and redbrown +
deciduous +  and persistent +
spreading +  and deflexed +
conspicuous +
with hairlike bristles +  and setose +
4 (?) +  and 8 (?) +
subterete +  and flattened or channeled +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 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 />) +
gray-green +  and yellow-green +
12 cm120 mm <br />0.12 m <br /> (22 cm220 mm <br />0.22 m <br />) +
segmented +
woody +  and succulent +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
yellow +  and yellowbrown +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Opuntia ×curvispina +
species +
dull +  and glossy +
yellow +  and paler +
segmented +
0 cm0 mm <br />0 m <br /> (20 cm200 mm <br />0.2 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
tree +  and shrubby +
terrestrial;epiphytic or epipetric +
erect +  and trailing +
gray +, tan +  and brown +