Ferocactus hamatacanthus

(Muehlenpfordt) Britton & Rose

Cact. 3: 144. 1922.

Common names: Texas barrel cactus
Illustrated
Basionym: Echinocactus hamatacanthus Muehlenpfordt Allg. Gartenzeitung 14: 371. 1846 (as hamatocanthus)
Treatment appears in FNA Volume 4. Mentioned on page 208, 209, 243, 244.

Stems erect, spheric to short cylindric, 10–63 × 7.5–30 cm; ribs 10–17, crenate or sharply notched to undulate or deeply sinuate, hence ribs prominent to poorly defined, or stem sometimes tuberculate. Spines 12–16 (–28) per areole, pinkish brown and/or straw colored, often imparting appearance of dried grass clump, smallest spines per areole slender, sometimes bristlelike, less than 1 mm diam.; central spines 4 (–8) per areole, terete to strongly flattened, apically curved or strongly hooked, very flexible, sometimes almost papery, smooth to weakly annulate, principal central spine (40–) 60–165 × (0.5–) 1–3 mm. Flowers yellow inside and out, 5.5–8 (–10) × 6.5–9.5 cm; inner tepals bright lemon yellow, very glossy; stigma lobes pale-yellow. Fruits indehiscent, green or maroon, 20–50 × 10–30 mm, thin walled, soft, juicy, locule filled with very juicy pulp and seeds. Seeds 1–1.6 mm, pitted.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Principal central spine angled or terete, hard, narrow, mostly 1-1.5 mm wide; stigma lobes 11-14; seeds 1.4-1.6 mm; mostly west of Pecos River in Chihuahuan desert scrub Ferocactus hamatacanthus var. hamatacant
1 Principal central spine flattened, sometimes almost papery, broad, 1.3-3 mm wide; stigma lobes 8-10; seeds 1 mm; mostly east of Pecos River in Tamaulipan thorn scrub Ferocactus hamatacanthus var. sinuatus

No values specified.

... more about "Ferocactus hamatacanthus"
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 +
Texas barrel cactus +
not mucilaginous +
N.Mex. +, Tex. +  and n Mexico +
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 +
maroon;green +
indehiscent +
persistent +
20mm;50mm +
cylindric +, ovoid +  and spheric +
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 +
not mucilaginous +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
6 cm60 mm <br />0.06 m <br /> (16.5 cm165 mm <br />0.165 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
ridgelike +  and nipple--shaped +
, +  and whitish +
prominent +  and poorly defined +
sharply notched +  and undulate or deeply sinuate +
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 +
spheric +  and short cylindric +
succulent +
7.5cm;30cm +
tuberculate +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Ferocactus hamatacanthus +
Ferocactus +
species +
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 +