Ferocactus hamatacanthus var. hamatacanthus

Illustrated
Synonyms: Ferocactus hamatacanthus var. crassispinus
Treatment appears in FNA Volume 4. Treatment on page 246. Mentioned on page 243, 247.

Stems ovoid or ovoid-cylindric, 10–63 × 7.5–30 cm; ribs 13–17, undulate or crenate. Spines 12–16 (–28) per areole; central spines 4 (–8) per areole, principal central spine terete or angled, 60–165 × (0.5–) 1–1.5 (–2.5) mm, hard. Flowers 5.5–8 (–10) × 6.5–9.5 cm; stigma lobes 11–14. Fruits green to greenish brown or dull brownish purple, 30–50 × 25–30 mm. Seeds 1.4–1.6 mm. 2n = 22.


Phenology: Flowering summer.
Habitat: Chihuahuan desert scrub, prairies, semidesert grasslands, oak-juniper savannas, pine-oak woodlands, stony hills, bluffs, and flats, igneous and calcareous substrates
Elevation: 500-2300 m

Distribution

V4 451-distribution-map.gif

N.Mex., Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango), Mexico (San Luis Potosí), Mexico (Zacatecas)

Discussion

In Mexico, plants of Ferocactus hamatacanthus var. hamatacanthus grow much larger; our measurements pertain only to northern specimens.

Selected References

None.

Lower Taxa

None.
cushionlike +
blunt +, ovoid +  and cylindric +
circular to linear +
deciduous +  and persistent +
connected +
nearly circular +  and oblong or elliptic +
slender +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(Muehlenpfordt) Britton & Rose +
hardened +
Echinocactus hamatacanthus +
triangular +
smooth +  and weakly annulate +
hooked +, terete +  and strongly flattened +
proliferating +
flattened +  and cylindric +
not mucilaginous +
N.Mex. +, Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Durango) +, Mexico (San Luis Potosí) +  and Mexico (Zacatecas) +
500-2300 m +
not separating +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
8.5 cm85 mm <br />0.085 m <br /> (10 cm100 mm <br />0.1 m <br />) +
5.5 cm55 mm <br />0.055 m <br /> (8 cm80 mm <br />0.08 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (8.5 cm85 mm <br />0.085 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 />) +
6.5cm;9.5cm +
green;greenish brown or dull brownish purple +
indehiscent +
persistent +
30mm;50mm +
cylindric +, ovoid +  and spheric +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Chihuahuan desert scrub, prairies, semidesert grasslands, oak-juniper savannas, pine-oak woodlands, stony hills, bluffs, and flats, igneous and calcareous substrates +
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 +
13 cm130 mm <br />0.13 m <br /> (17 cm170 mm <br />0.17 m <br />) +
30mm +  and 130mm +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
obtuse +, denticulate +  and fimbriate +
deciduous +  and persistent +
Flowering summer. +
not mucilaginous +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
6 cm60 mm <br />0.06 m <br /> (16.5 cm165 mm <br />0.165 m <br />) +
angled +  and terete +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
ridgelike +  and nipple--shaped +
, +  and whitish +
prominent +  and poorly defined +
crenate +  and undulate +
broadly rounded +  and lanceolate +
arillate +  and strophiolate +
0.29 cm2.9 mm <br />0.0029 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
spheric;subreniform +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Illustrated +
radial +  and cluster +
straw colored +  and pinkish brown +
straight +  and curved +
deciduous +  and persistent +
12 (?) +  and 16 (?) +
annulate-ridged +, hairlike +, daggerlike +, subulate +  and acicular +
1.5 cm15 mm <br />0.015 m <br /> (7 cm70 mm <br />0.07 m <br />) +
hard +  and rigid +
decurrent +
unsegmented +
80 cm800 mm <br />0.8 m <br /> (100 cm1,000 mm <br />1 m <br />) +
10cm;63cm +
tuberculate +
ovoid-cylindric +  and ovoid +
succulent +
7.5cm;30cm +
tuberculate +
Ferocactus hamatacanthus var. crassispinus +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Ferocactus hamatacanthus var. hamatacanthus +
Ferocactus hamatacanthus +
variety +
straight +
distinct +
reticulate +  and pitted +
flat +, concave +  and convex +
dull +  and glossy +
annulate-ridged +
branched +  and unbranched +
epiphytic;epiphytic;epiphytic +
leaning +  and erect +
barrel-shaped +  and spheric +