Echinomastus erectocentrus var. erectocentrus

Treatment appears in FNA Volume 4. Treatment on page 194.

Stems 5–34.5 × 6.3–10 cm; ribs 18–21; areoles 8–14 mm apart along ribs. Spines 14–19 per areole, purplish; radial spines 13–18 per areole; abaxial (shortest) radial spine 6–15 × 0.3–0.5 mm; adaxial and lateral (longest) radial spines 9–25 mm; central spines erect, 1 (–2) per areole, 12–29 × 0.4–0.9 mm, longest adaxial central spine straight or sometimes curved toward apex of plant; abaxial or solitary central spine 13–15 (–29) mm. Flowers 3.9–7 × 4.4–5.2 cm; inner tepals whitish, pale lavender, or very pale-pink, proximally olive green, 2.5–2.7 × 0.6–1 cm; stigma lobes red to dark red, papillae red. 2n = 22.


Phenology: Flowering Mar–May.
Habitat: Desert grasslands, low gravelly hills and bajadas, igneous and calcareous substrates
Elevation: 900-1500 m

Discussion

Echinomastus erectocentrus var. erectocentrus is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.
1.3 cm13 mm <br />0.013 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
cushionlike +
circular to linear +
deciduous +  and persistent +
hourglass--shaped +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(J. M. Coulter) Britton & Rose +
hardened +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
olive-green +  and orangish brown chestnut or maroon +
2.5 cm25 mm <br />0.025 m <br /> (4.3 cm43 mm <br />0.043 m <br />) +
Echinocactus erectocentrus +
triangular +
curved +  and straight +
12mm +  and 29mm +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
proliferating +
flattened +  and cylindric +
mucilaginous +
firm +  and hard +
connected +
divided +  and notched +
900-1500 m +
not separating +
3.9 cm39 mm <br />0.039 m <br /> (7 cm70 mm <br />0.07 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 />) +
4.4cm;5.2cm +
pink;dull;brown;pink;dull;brown;green +
persistent +, long +  and deciduous +
12mm;20mm +
ellipsoid-cylindric +
succulent +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
obscured +  and obliterated +
Desert grasslands, low gravelly hills and bajadas, igneous and calcareous substrates +
2.5 cm25 mm <br />0.025 m <br /> (2.7 cm27 mm <br />0.027 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 Mar–May. +
mucilaginous +
ridgelike +  and nipple--shaped +
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 +
1.5 cm15 mm <br />0.015 m <br /> (2.9 cm29 mm <br />0.029 m <br />) +
curved +  and straight +
deciduous +  and persistent +
6mm +  and 15mm +
13 (?) +  and 18 (?) +
annulate-ridged +, hairlike +, daggerlike +, subulate +  and acicular +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
hard +  and rigid +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
decurrent +
unsegmented +
5cm;34.5cm +
4 +  and 34.5 +
cylindric +, ovoid +  and spheric +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
succulent +
6.3cm;10cm +
red +  and dark red +
tuberculate +
Neolloydia erectocentra +  and Sclerocactus erectocentrus +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Echinomastus erectocentrus var. erectocentrus +
Echinomastus erectocentrus +
variety +
undulate +  and entire +
dull +  and glossy +
epiphytic;epiphytic;epiphytic +
not deep-seated +
barrel-shaped +  and spheric +