Mammillaria wrightii var. wilcoxii

(Toumey ex K. Schumann) W. T. Marshall

Ariz. Cactuses, 100. 1950.

Common names: Wilcox’s fishhook cactus
Basionym: Mammillaria wilcoxii Toumey ex K. Schumann Gesamtbeschr. Kakt., 545. 1898 (as Mamillaria) Mammillaria meridiorosei Castetter P. Pierce & K. Schwerin
Treatment appears in FNA Volume 4. Treatment on page 250. Mentioned on page 251, 253.

Stem tubercles 6–21 mm. Radial spines usually 16–30 per areole. Flowers 2.2–5.1 cm diam. Fruits 6–15 mm diam.


Phenology: Flowering summer; fruiting fall.
Habitat: Semidesert grasslands, Madrean pine-oak woodlands, steep, rocky slopes, canyons, and valleys, usually on alluvial or igneous substrates
Elevation: 1100-2000 m

Distribution

V4 457-distribution-map.gif

Ariz., N.Mex., Mexico (Chihuahua), Mexico (Sonora)

Discussion

In rocky habitats near the Mexican border, populations of Mammillaria wrightii var. wilcoxii tend to have more radial spines and smaller flowers than elsewhere and have been segregated as M. meridiorosei.

Almost half of the published descriptions and illustrations purporting to represent variety wilcoxii are misidentifications of Mammillaria viridiflora.

Selected References

None.

Lower Taxa

None.
cushionlike +
needlelike +  and bristlelike +
circular to linear +
2.5 cm25 mm <br />0.025 m <br /> (3.1 cm31 mm <br />0.031 m <br />) +
deciduous +  and persistent +
0.2 cm2 mm <br />0.002 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
plumose +  and hairlike +
0.001 cm0.01 mm <br />1.0e-5 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(Toumey ex K. Schumann) W. T. Marshall +
hardened +
Mammillaria wilcoxii +  and Mammillaria meridiorosei +
triangular +
1.4 cm14 mm <br />0.014 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
curved +  and straight +
projecting +  and porrect +
all +, 1 +  and 4 +
1.2 cm12 mm <br />0.012 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
proliferating +
flattened +  and cylindric +
Wilcox’s fishhook cactus +
mucilaginous +
Ariz. +, N.Mex. +, Mexico (Chihuahua) +  and Mexico (Sonora) +
1100-2000 m +
not separating +
3.5 cm35 mm <br />0.035 m <br /> (5.2 cm52 mm <br />0.052 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
2.2 cm22 mm <br />0.022 m <br /> (5.1 cm51 mm <br />0.051 m <br />) +
unconnected +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 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 />) +
2.2cm;4.5cm +
2 cm20 mm <br />0.02 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
0.19 cm1.9 mm <br />0.0019 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
purple;dull;green +
indehiscent +
persistent +, long +  and deciduous +
13mm;20mm +
spheric +  and ovoid or obovoid +
0.7 cm7 mm <br />0.007 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
Semidesert grasslands, Madrean pine-oak woodlands, steep, rocky slopes, canyons, and valleys, usually on alluvial or igneous substrates +
0.4 cm4 mm <br />0.004 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1.5mm;8.5mm +
conspicuously narrower +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 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 +
deciduous +  and persistent +
Flowering summer +  and fruiting fall. +
bowl--shaped +
mucilaginous +
ridgelike +  and nipple--shaped +
Ariz. Cactuses, +
bristly +  and woolly +
3;2;2;30 +
triangular +
arillate +  and strophiolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
obovoid;pyriform;obovoid;pyriform;lenticular-reniform;comma--shaped;spheric +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
tipped brown +  and white +
straight +  and curved +
deciduous +  and persistent +
16 (?) +  and 30 (?) +
annulate-ridged +, hairlike +, daggerlike +, subulate +  and acicular +
0.3 cm3 mm <br />0.003 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
hard +  and rigid +
decurrent +
unsegmented +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
purplish +, green +  and gray-green +
4cm;8cm +
spheric +  and flat-topped +
0.6 cm6 mm <br />0.006 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
4cm;8cm +
pale green +  and yellow +
tuberculate +
Chilita +, Cochemiea +, Dolichothele +, Ebnerella +, Leptocladodia +, Neomammillaria +  and Phellosperma +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Mammillaria wrightii var. wilcoxii +
Mammillaria wrightii +
variety +
flat +  and concave +
dull +  and glossy +
not confluent +
3mm +  and 25mm +
cylindric +, conic +  and pyramidal +
0.6 cm6 mm <br />0.006 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
2mm +  and 9mm +
fibrous +  and succulent +
straight +
sinuate +
epiphytic;epiphytic;epiphytic +
barrel-shaped +  and spheric +