Opuntia engelmannii

Salm-Dyck ex Engelmann

Boston J. Nat. Hist. 6: 207. 1850.

Common names: Engelmann’s pricklypear cactus apple
Treatment appears in FNA Volume 4. Treatment on page 135. Mentioned on page 126, 128, 134, 136, 139, 141.

Shrubs or trees, with short trunk, spreading to sometimes decumbent, 1–3 m. Stem segments not disarticulating, yellow-green to blue-green, flattened, circular to obovate to rhombic, or apex tapering, elongate, 15–40 (–120) × 10–40 cm, ± tuberculate, glabrous, often glaucous; areoles 5–8 per diagonal row across midstem segments, evenly distributed on stem segment to absent, subcircular to obovate, 4–7 × 4–6 mm; wool tawny, aging blackish. Spines (0–) 1–6 (–12) per areole, white to yellow, usually red to dark-brown at extreme bases, aging gray to ± black, subulate, straight to curved, flattened to angular at least near base, the longest spreading to strongly reflexed, 10–30 (–50) mm. Glochids widely spaced, sparse in crescent at adaxial edge, encircling areole or nearly so, and scattered in subapical tuft, yellow to redbrown, aging gray to blackish, of irregular lengths, to 10 mm. Flowers: inner tepals uniformly yellow to buff, sometimes orange to pink to red (rarely whitish), 30–40 mm; filaments, anthers, and style whitish to cream; stigma lobes yellow-green to green. Fruits dark red to purple throughout, sometimes stipitate, ovate-elongate to barrel-shaped, 35–90 × 20–40 mm, juicy (bleeding and staining), glabrous, spineless; areoles 20–32 usually toward apex. Seeds tan to grayish, subcircular to deltoid, flattened, 2.5–6 × 2–5 mm; girdle protruding 0.3–0.5 mm.

Distribution

V4 252-distribution-map.gif

Ariz., Calif., La., N.Mex., Nev., Tex., Utah, n Mexico

Discussion

Varieties 5 (5 in the flora).

The basal portions of stems seedlings of Opuntia engelmannii bear long hairlike spines.

The name Opuntia dillei Griffiths has been used for a spineless or nearly spineless morphotype of O. engelmannii.

Selected References

None.

Key

1 Stem segments becoming very elongate, 2+ times longer than wide, lanceolate to linear-lanceolate, often falcate Opuntia engelmannii var. linguiformis
1 Stem segments to 1.5 times longer than wide, commonly circular to obovate to rhomboid > 2
2 Spines chalky white, yellow when wetted, with dark red-brown extreme bases. Opuntia engelmannii var. engelmannii
2 Spines pale to dark yellow, not chalky white, at times with red-brown extreme bases > 3
3 Stem segments with spines straight or slightly curving, spreading Opuntia engelmannii var. lindheim
3 Stem segments with spines strongly deflexed or arching downward near bases > 4
4 Spines arching downward near bases; sc Ari- zona Opuntia engelmannii var. flavispi
4 Spines strongly deflexed; s Texas. Opuntia engelmannii var. flexispi
... more about "Opuntia engelmannii"
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 +
Salm-Dyck ex Engelmann +
proliferating +
flattened +  and cylindric +
Engelmann’s pricklypear +  and cactus apple +
Ariz. +, Calif. +, La. +, N.Mex. +, Nev. +, Tex. +, Utah +  and n Mexico +
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 +
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 +
ridgelike +  and nipple--shaped +
Boston J. Nat. Hist. +
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 />) +
not sheathed +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
gray +  and more or less black +
straight +  and curved +
deciduous +  and persistent +
spreading +  and strongly reflexed +
conspicuous +
with hairlike bristles +  and setose +
1 (?) +  and 6 (?) +
flattened +  and angular +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 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 +
2 cm20 mm <br />0.02 m <br /> (60 cm600 mm <br />0.6 m <br />) +
pubescent +  and glabrous +
nearly smooth +  and tuberculate +
1.2 cm12 mm <br />0.012 m <br /> (40 cm400 mm <br />0.4 m <br />) +
segmented +
woody +  and succulent +
yellow-green +  and green +
whitish +  and cream +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Opuntia engelmannii +
species +
dull +  and glossy +
yellow +  and paler +
segmented +
tree +  and shrub +
terrestrial;epiphytic or epipetric +
spreading to sometimes +
blackish +  and tawny +