Echinomastus intertextus var. dasyacanthus

(Engelmann) Backeberg

Cactaceae 5: 2832. 1961.

Endemic
Basionym: Echinocactus intertextus var. dasyacanthus Engelmann Proc. A mer. Acad. Arts 3: 277. 1856
Synonyms: Neolloydia intertexta var. dasyacantha (Engelmann) L. D. Benson Sclerocactus intertextus var. dasyacanthus (Engelmann) N. P. Taylor
Treatment appears in FNA Volume 4. Treatment on page 196. Mentioned on page 195.

Stems spheric, obovoid, or ovoid to cylindric, appearing bristly and dangerous to handle. Spines slightly appressed to spreading, except for the porrect adaxial central spine which 4–15 (–20) mm. 2n = 22.


Phenology: Flowering Feb–Apr; fruiting Apr–Jun.
Habitat: Desert grasslands and plains grasslands, upper edge of Chihuahuan desert scrub, grassy hills, bajadas, sometimes with oaks and junipers, igneous substrates (rarely limestone)
Elevation: 1100-2100 m

Discussion

In the Chisos Mountains of Texas, one isolated population of Echinomastus intertextus, identified as var. dasyacanthus on the basis of spine length, is sympatric with the vegetatively similar E. warnockii. The figure captioned as “Neolloydia” intertexta var. dasyacantha (L. D. Benson 1982, color fig. 155) is typical E. warnockii.

Echinomastus intertextus var. dasyacanthus presumably occurs in extreme northern Chihuahua, but we have not seen any specimens.

Selected References

None.

Lower Taxa

None.
1.4 cm14 mm <br />0.014 m <br /> (2 cm20 mm <br />0.02 m <br />) +
nearly +  and straight +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (2 cm20 mm <br />0.02 m <br />) +
cushionlike +
circular to linear +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
deciduous +  and persistent +
hourglass--shaped +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(Engelmann) Backeberg +
hardened +
Echinocactus intertextus var. dasyacanthus +
triangular +
curved +  and straight +
proliferating +
flattened +  and cylindric +
mucilaginous +
firm +  and hard +
connected +
divided +  and notched +
N.Mex. +  and Tex. +
1100-2100 m +
not separating +
3 cm30 mm <br />0.03 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
3 cm30 mm <br />0.03 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 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 />) +
2.5cm;3cm +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
pink;dull;brown;pink;dull;brown;green +
persistent +, long +  and deciduous +
6mm;15mm +
spheric +
succulent +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
obscured +  and obliterated +
Desert grasslands and plains grasslands, upper edge of Chihuahuan desert scrub, grassy hills, bajadas, sometimes with oaks and junipers, igneous substrates (rarely limestone) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (2.5 cm25 mm <br />0.025 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 +
1.8 cm18 mm <br />0.018 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
deciduous +  and persistent +
Flowering Feb–Apr +  and fruiting Apr–Jun. +
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 +
tipped reddish-brown +, tan +  and pale gray pinkish or reddish-brown +
curved +  and straight +
deciduous +  and persistent +
5mm +  and 13mm +
slightly appressed +  and spreading +
13 (?) +  and 25 (?) +
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 +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
decurrent +
unsegmented +
5cm;17cm +
ovoid +  and cylindric +
succulent +
3cm;10cm +
pink +  and bright red +
tuberculate +
Neolloydia intertexta var. dasyacantha +  and Sclerocactus intertextus var. dasyacanthus +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Echinomastus intertextus var. dasyacanthus +
Echinomastus intertextus +
variety +
undulate +  and entire +
dull +  and glossy +
epiphytic;epiphytic;epiphytic +
not deep-seated +
barrel-shaped +  and spheric +