Ferocactus viridescens var. viridescens

Treatment appears in FNA Volume 4. Treatment on page 245. Mentioned on page 243.

Stems erect, oblate to spheric (to short cylindric), usually 10–20 (–45) × 10–20 (–35) cm; ribs 13–21 [–34], shallowly notched immediately above each areole. Spines 10–19 per areole, central spines and larger radial spines pink or yellowish, smallest spines per areole slender, sometimes bristlelike, less than 1 mm diam. (rarely absent); central spines 4 per areole, straight or slightly curved, annulate, thin and flattened, narrowly elliptic in cross-section, principal central spine 30–50 × 2–3 (–5) mm. Flowers 2.5–5 × 3–6 cm, color similar inside and out; inner tepals greenish yellow, sometimes with reddish-brown midstripes; stigma lobes yellow. Fruits ± readily dehiscent through basal pore, bright-yellow (very rarely reddish), 20–35 × 15–25 mm, leathery or fleshy, locule dry, hollow except for seeds. Seeds 1.5–1.7 mm, pitted. 2n = 22.


Phenology: Flowering spring–early summer.
Habitat: Rocky coastal bluffs, coastal chaparral
Elevation: 0-200 m

Distribution

V4 447-distribution-map.gif

Calif., Mexico (Baja California)

Discussion

In California, Ferocactus viridescens and F. cylindraceus are allopatric. In the absence of geographic data, the largest plants of F. viridescens might not always be distinguishable from straight-spined mature plants of F. cylindraceus. Immature plants of F. cylindraceus have mostly or entirely hooked spines but gradually switch to producing straighter spines in old age. In Baja California, the taxonomic distinctions between the two species are muddled.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

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 +
(Torrey & A. Gray) Britton & Rose +
hardened +
Echinocactus viridescens +
triangular +
curved +  and straight +
proliferating +
flattened +  and cylindric +
not mucilaginous +
Calif. +  and Mexico (Baja California) +
0-200 m +
not separating +
8.5 cm85 mm <br />0.085 m <br /> (10 cm100 mm <br />0.1 m <br />) +
3cm +  and 6cm +
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 />) +
hollow +, spineless +  and walled +
bright-yellow +
persistent +
20mm;35mm +
cylindric +, ovoid +  and spheric +
fleshy +  and leathery +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Rocky coastal bluffs, coastal chaparral +
yellowish +  and pink +
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 +
reddish-brown +
deciduous +  and persistent +
Flowering spring–early summer. +
not mucilaginous +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
ridgelike +  and nipple--shaped +
, +  and whitish +
prominent +
notched +
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 +
reddish +  and salmon +
straight +  and curved +
deciduous +  and persistent +
10 (?) +  and 19 (?) +
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 +
20 cm200 mm <br />0.2 m <br /> (35 cm350 mm <br />0.35 m <br />) +
10cm;20cm +
oblate +  and spheric +
succulent +
10cm;20cm +
tuberculate +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Ferocactus viridescens var. viridescens +
Ferocactus viridescens +
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 +