Pediocactus paradinei

B. W. Benson

Cact. Succ. J. (Los Angeles) 29: 136, figs 83, 84. 1957.

Common names: Houserock cactus park hedgehog cactus
EndemicConservation concern
Synonyms: Pediocactus simpsonii var. paradinei (B. W. Benson) Halda Pilocanthus paradinei (B. W. Benson) B. W. Benson & Backeberg
Treatment appears in FNA Volume 4. Mentioned on page 214.

Plants unbranched. Stems subglobose to globose, 3–7.5 × 2.5–5.5 (–8) cm; areoles circular to oval, villous. Spines smooth, thin and flexible, sometimes distinguishable as radial and central; radial spines 13–22 per areole, straight or curving irregularly, white, 20–25 × 0.2–0.3 mm; central spines 3–6 per areole, dense in mature plants, white to pale gray, straight, flexible, hairlike, 8–35 × 0.3 mm. Flowers 1.5–2.2 × 1.9–2.5 cm; scales and outer tepals minutely toothed or denticulate or entire and undulate; outer tepals brown midstripes with pale or white margins, oblanceolate, 8–20 × 3–6 mm; inner tepals light yellow to pink, oblanceolate, 15–20 × 4–6 mm. Fruits greenish yellow maturing to reddish-brown, cylindric, 7–10 × 5–8 mm. Seeds black, 2.5 × 2 mm, papillate but not rugose.


Phenology: Flowering spring.
Habitat: Gravelly limestone soils of pinyon-juniper, ponderosa pine, and grama grass communities
Elevation: 1500-2100 m

Discussion

Of conservation concern.

Pediocactus paradinei is endemic to the Kaibab Plateau region of northern Arizona.

Selected References

None.

Lower Taxa

None.
... more about "Pediocactus paradinei"
cushionlike +
circular to linear +
deciduous +  and persistent +
circular +  and oval +
Kenneth D. Heil +  and J. Mark Porter +
B. W. Benson +
hardened +
triangular +
white +  and pale gray +
8mm +  and 35mm +
0.3 cm3 mm <br />0.003 m <br /> (?) +
proliferating +
flattened +  and cylindric +
Houserock cactus +  and park hedgehog cactus +
mucilaginous +
1500-2100 m +
not separating +
1.5 cm15 mm <br />0.015 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
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 />) +
1.9cm;2.5cm +
reddish-brown;greenish yellow +
persistent +, long +  and deciduous +
7mm;10mm +
cylindric +
dry +, fleshy +  and juicy +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Gravelly limestone soils of pinyon-juniper, ponderosa pine, and grama grass communities +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
oblanceolate +
deciduous +  and persistent +
rudimentary +
flat +  and terete +
nearly +  and microscopic +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
tuberculate +
fluted;spheric;depressed-spheric or club-shaped +
white +  and pale +
entire +  and fimbriate +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
oblanceolate +
3mm +  and 6mm +
0.9 cm9 mm <br />0.009 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
deciduous +  and persistent +
Flowering spring. +
mucilaginous +
ridgelike +  and nipple--shaped +
Cact. Succ. J. (Los Angeles) +
greenish +  and white +
3;2;2;30 +
undulate +, entire +, denticulate +  and toothed +
thin +  and broad +
arillate +  and strophiolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (?) +
not rugose +  and papillate +
pyriform;obovoid +
2 cm20 mm <br />0.02 m <br /> (?) +
Endemic +  and Conservation concern +
curving +  and straight +
deciduous +  and persistent +
20mm +  and 25mm +
recurved +, erect +  and spreading +
distinguishable +
finely puberulent +  and glabrous +
13 (?) +  and 22 (?) +
pectinate +, awl-shaped +  and hairlike +
0.1 cm1 mm <br />0.001 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
spongy +, corky +  and hard +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
decurrent +
unsegmented +
5.5 cm55 mm <br />0.055 m <br /> (8 cm80 mm <br />0.08 m <br />) +
gray-green +  and green +
3cm;7.5cm +
subglobose +  and globose +
succulent +
2.5cm;5.5cm +
yellow +  and green +
tuberculate +
Pediocactus simpsonii var. paradinei +  and Pilocanthus paradinei +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Pediocactus paradinei +
Pediocactus +
species +
dull +  and glossy +
not confluent +
mammillate +, cylindroid +, truncate-conic +, conic +  and pyramidal +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
epiphytic;epiphytic;epiphytic +
hanging +  and erect to prostrate +
barrel-shaped +  and spheric +