Echinomastus mariposensis

Hester

Desert Pl. Life 17: 59, fig. s.n. (p. 60). 1945.

Common names: Mariposa cactus
Conservation concern
Synonyms: Neolloydia mariposensis (Hester) L. D. Benson Sclerocactus mariposensis (Hester) N. P. Taylor
Treatment appears in FNA Volume 4. Treatment on page 195. Mentioned on page 193, 196.

Stems 3–10 × 3–6 cm; ribs usually 21 (or stems strictly tuberculate); areoles 6–12 mm apart along ribs; areolar glands absent. Spines 23–30 per areole, pale tan to grayish white, largest spines often tipped “chalky” or “dusty” blue-gray and brown; radial spines 19–26 per areole; abaxial (shortest) radial spine 3–7 × 0.1–0.25 mm; adaxial and lateral (longest) radial spines 5–11 (–15) mm; central spines 4 (–6) per areole, 12–21 × 0.2–0.6 mm; longest adaxial central spines erect or ascending, often slightly curved toward stem apex, abaxial central spine 5–8 (–15) mm, descending or porrect and often decurved. Flowers 2.2–2.3 × 1.9–4 cm; inner tepals white with complete or partial midstripes of either dull pink or pale yellowish tan to pale green, 1–2 cm × 1.5–4 mm; stigma lobes green or yellow-green. Fruits indehiscent or disintegrating irregularly, short oblong or spheric, 10 × 8 mm. 2n = 22.


Phenology: Flowering Feb–Mar; fruiting Apr.
Habitat: Chihuahuan desert scrub and margin of Tamaulipan thorn scrub, rocky sites, barren hilltops, limestone
Elevation: 500-1300 m

Discussion

Of conservation concern.

Echinomastus mariposensis prefers rockier sites than other species of Echinomastus in the Chihuahuan Desert. It usually inhabits limestone and is abruptly replaced by E. warnockii on gypsum and other substrates. Immature plants have only two central spines, one above the other, both 3 mm, resembling immature Coryphantha tuberculosa except for subtleties of color, thickness, and orientation of the spines.

Selected References

None.

Lower Taxa

None.
... more about "Echinomastus mariposensis"
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
decurved +, porrect +  and descending +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
cushionlike +
circular to linear +
deciduous +  and persistent +
hourglass--shaped +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
Hester +
hardened +
triangular +
curved +  and straight +
12mm +  and 21mm +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
proliferating +
flattened +  and cylindric +
Mariposa cactus +
mucilaginous +
firm +  and hard +
connected +
divided +  and notched +
Tex. +  and Mexico (Coahuila) +
500-1300 m +
not separating +
2.2 cm22 mm <br />0.022 m <br /> (2.3 cm23 mm <br />0.023 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;4cm +
pink;dull;brown;pink;dull;brown;green +
disintegrating +  and indehiscent +
persistent +, long +  and deciduous +
spheric +, oblong +  and short +
succulent +
8 cm80 mm <br />0.08 m <br /> (?) +
obscured +  and obliterated +
Chihuahuan desert scrub and margin of Tamaulipan thorn scrub, rocky sites, barren hilltops, limestone +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 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 +
partial +  and complete +
deciduous +  and persistent +
Flowering Feb–Mar +  and fruiting Apr. +
mucilaginous +
ridgelike +  and nipple--shaped +
Desert Pl. Life +
1 +  and 20 +
triangular +
arillate +  and strophiolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
hemispheric;spheric +
Conservation concern +
pale tan +  and grayish white +
curved +  and straight +
deciduous +  and persistent +
3mm +  and 7mm +
19 (?) +  and 26 (?) +
annulate-ridged +, hairlike +, daggerlike +, subulate +  and acicular +
0.3 cm3 mm <br />0.003 m <br /> (3.7 cm37 mm <br />0.037 m <br />) +
hard +  and rigid +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.025 cm0.25 mm <br />2.5e-4 m <br />) +
decurrent +
unsegmented +
3cm;10cm +
cylindric +, ovoid +  and spheric +
succulent +
3cm;6cm +
yellow-green +  and green +
tuberculate +
Neolloydia mariposensis +  and Sclerocactus mariposensis +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Echinomastus mariposensis +
Echinomastus +
species +
undulate +  and entire +
dull +  and glossy +
blue-gray and brown +
epiphytic;epiphytic;epiphytic +
not deep-seated +
barrel-shaped +  and spheric +