Ariocarpus fissuratus var. fissuratus

Treatment appears in FNA Volume 4. Treatment on page 241. Mentioned on page 238.

Plants protruding above ground 0–2 (–10) cm. Stems: tubercles forming coarse mosaic, closely packed, exposed faces of tubercles deltoid to hemispheric, deeply fissured on either side of central areolar groove, coarsely rugose, often sharply angled apically; areoles to 3 mm wide, sometimes confined to middle of tubercle faces instead of extending to tips. Flowers 2.5–5 cm diam., 2 times wider than long when fully expanded; inner tepals 21–30 × 5.5–7.5 (–10) mm.


Phenology: Flowering Sep–Nov.
Habitat: Chihuahuan desert scrub, low, rocky hills of limestone chips
Elevation: 500-1500 m

Distribution

V4 441-distribution-map.gif

Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango)

Discussion

The stems of Ariocarpus fissuratus are normally flush with the soil surface and resemble limestone chips in shape, color, and texture, rendering the plants extremely cryptic. The species is often found growing with Agave lechuguilla and species of Leucophyllum, and Parthenium.

Selected References

None.

Lower Taxa

None.
cushionlike +
circular to linear +
deciduous +  and persistent +
elongate +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(Engelmann) K. Schumann in H. G. A. Engler and K. Prantl +
hardened +
Mammillaria fissuratus +
triangular +
elongate +
proliferating +
flattened +  and cylindric +
not mucilaginous +
Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +  and Mexico (Durango) +
500-1500 m +
not separating +
rugose +  and fissured +
angled;deltoid;hemispheric +
differentiated +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 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 />) +
1.5cm;5cm +
cream;pale greenish +
indehiscent +
persistent +, long +  and deciduous +
10mm;25mm +
spheric +  and clavate or cylindric +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Chihuahuan desert scrub, low, rocky hills of limestone chips +
0.75 cm7.5 mm <br />0.0075 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2.1 cm21 mm <br />0.021 m <br /> (3 cm30 mm <br />0.03 m <br />) +
5.5mm;7.5mm +
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 +
1.2 cm12 mm <br />0.012 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
deciduous +  and persistent +
Flowering Sep–Nov. +
not mucilaginous +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
aboveground +
cryptic +  and flush +
tuberculate +
rigid +  and hard +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
ridgelike +  and nipple--shaped +
in H. G. A. Engler and K. Prantl, Nat. Pfla nzenfam. +
white +  and pale greenish +
3;2;2;30 +
triangular +
arillate +  and strophiolate +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
tuberculate +
spheric;obovoid +
Illustrated +
deciduous +  and persistent +
0 (?) +  and 90 (?) +
annulate-ridged +, hairlike +, daggerlike +, subulate +  and acicular +
hard +  and rigid +
decurrent +
unsegmented +
gray-green +
segmented +
succulent +
tuberculate +
Neogomesia +  and Roseocactus +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Ariocarpus fissuratus var. fissuratus +
Ariocarpus fissuratus +
variety +
dull +  and glossy +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
8mm +  and 20mm +
triangular +
11mm +  and 25mm +
epiphytic;epiphytic;epiphytic +
barrel-shaped +  and spheric +