Coryphantha robbinsorum

(W. Earle) A. D. Zimmerman

Cac t. Succ. J. (Los Angeles) 50: 294. 1978.

Common names: Cochise pincushion cactus Cochise foxtail cactus
Conservation concern
Basionym: Cochiseia robbinsorum W. Earle Saguaroland Bull. 30: 64. 1976
Synonyms: Escobaria robbinsorum (W. Earle) D. R. Hunt
Treatment appears in FNA Volume 4. Treatment on page 231. Mentioned on page 223.

Plants usually unbranched, spine-bearing areoles with long white wool obscuring basal portion of spine. Roots diffuse or short taproots. Stems deep-seated (buried except for its apical 0.5–3 cm), 2–10 × 2–6 cm; tubercles 5–8 × 4–6 mm, moderately soft; areolar glands absent. Spines 11–20 per areole, white, largest spines dark tipped when fresh, straight; radial spines 10–20 per areole, 8–18 × 0.2–0.5 mm; central spines 0 (–1) per areole, similar to largest radial spines, but porrect, ca. 8–18 mm. Flowers nearly apical, 12–29 × 10–18.5 mm; outer tepals fringed; inner tepals 14 per flower, dull yellow, frequently tinted greenish or bronze, often with midstripes of brownish or dull pink; outer filaments greenish; anthers bright-yellow; stigma lobes green or yellow-green. Fruits bright-orange-red or scarlet, spheric to obovoid, 6–8.5 × 3–4.5 mm, slightly juicy, quickly drying and turning brownish; floral remnant weakly persistent, often deciduous through breakage not abscission. Seeds dark-brown, drying blackish, spheric, 1.3–1.4 mm, pitted. 2n = 22.


Phenology: Flowering Mar–Apr; fruiting Jun–Aug.
Habitat: Semidesert grasslands, limestone hills
Elevation: 1300-1500 m

Discussion

Of conservation concern.

Coryphantha robbinsorum is somewhat intermediate between the C. dasyacantha species-group, especially C. zilziana Boedeker, and the C. missouriensis species-group.

Coryphantha robbinsorum is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.
... more about "Coryphantha robbinsorum"
bright-yellow +
cushionlike +
spine-bearing +
circular to linear +
deciduous +  and persistent +
connected +
hourglass--shaped +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(W. Earle) A. D. Zimmerman +
spineless +  and naked +
hardened +
Cochiseia robbinsorum +
triangular +
not abscission +
curved +  and straight +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
proliferating +
flattened +  and cylindric +
Cochise pincushion cactus +  and Cochise foxtail cactus +
with mucilage +  and mucilaginous +
Ariz. +  and Mexico (Sonora) +
1300-1500 m +
not separating +
deciduous +  and persistent +
1.2 cm12 mm <br />0.012 m <br /> (2.9 cm29 mm <br />0.029 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 />) +
10mm;18.5mm +
brownish;scarlet;bright-orange-red +
indehiscent +
persistent +, long +  and deciduous +
6mm;8.5mm +
spheric +  and obovoid +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Semidesert grasslands, limestone hills +
0.45 cm4.5 mm <br />0.0045 m <br /> (4 cm40 mm <br />0.04 m <br />) +
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 +
fringed +  and toothed +
small +
pink +, dull +  and brownish +
deciduous +  and persistent +
Flowering Mar–Apr +  and fruiting Jun–Aug. +
mucilaginous +
ridgelike +  and nipple--shaped +
Cac t. Succ. J. (Los Angeles) +
colorless +  and white greenish or pinkish +
3;2;2;30 +
erose +  and entire +
rudimentary +
triangular +
arillate +  and strophiolate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
glossy +  and shiny +
spheric +
Conservation concern +
adventitious +
curved +  and straight +
deciduous +  and persistent +
8mm +  and 18mm +
10 (?) +  and 20 (?) +
annulate-ridged +, hairlike +, daggerlike +, subulate +  and acicular +
hard +  and rigid +
differentiated +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
decurrent +
unsegmented +
2cm;10cm +
deep-seated +
tuberculate +
flat-topped +, cylindric +, ovoid +, spheric +  and hemispheric +
succulent +
2cm;6cm +
yellow-green +  and green +
protruding +  and flat +
large +  and small +
tuberculate +
Escobaria robbinsorum +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Coryphantha robbinsorum +
Coryphantha +
species +
dull +  and glossy +
pitted +  and raised-reticulate +
5mm +  and 8mm +
conic +  and hemispheric or cylindric +
4mm +  and 6mm +
epiphytic;epiphytic;epiphytic +