Echinocereus pectinatus

(Scheidweiler) Engelmann in F. A. Wislizenus

in F. A. Wislizenus, Mem. Tour N. Mexico, 109. 1848.

Common names: Rainbow cactus
Basionym: Echinocactus pectinatus Scheidweiler Bull. Acad. Roy. Sci. Bruxelles 5: 492. 1838
Treatment appears in FNA Volume 4. Mentioned on page 163, 164.

Discussion

Varieties 2 (1 in the flora).

At least in the United States, Echinocereus pectinatus (diploid) has only pink or purple flowers, unlike the polymorphic species E. dasyacanthus (tetraploid). Echinocereus pectinatus differs from the entire E. reichenbachii species group in that the areoles of its relatively thick-walled flower tube have stouter spines and much shorter hairs. Superficially similar species west of the Continental Divide, formerly associated with E. pectinatus (E. pseudopectinatus, E. rigidissimus, and some Sonoran species), are more closely related to the E. reichenbachii species group with densely bristly flower buds and delicate, ephemeral inner tepals. Echinocereus pectinatus var. pectinatus is endemic to Mexico; reports from the United States were misidentifications of var. wenigeri, E. pseudopectinatus (in Arizona), and unusually short-spined plants of E. dasyacanthus.

Selected References

None.

... more about "Echinocereus pectinatus"
cushionlike +
confluent +, circular +  and linear +
circular to linear +
deciduous +  and persistent +
hourglass--shaped +
0.1 cm1 mm <br />0.001 m <br /> (5.2 cm52 mm <br />0.052 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(Scheidweiler) Engelmann in F. A. Wislizenus +
hardened +
Echinocactus pectinatus +
triangular +
curved +  and straight +
variously angled +  and flattened +
proliferating +
flattened +  and cylindric +
Rainbow cactus +
mucilaginous +
undulate +
Tex. +  and n Mexico +
not separating +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
2 cm20 mm <br />0.02 m <br /> (12 cm120 mm <br />0.12 m <br />) +
unisexual +  and bisexual +
2.6 cm26 mm <br />0.026 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
15mm;150mm +
red;pink;red;pink;purplish brown;green +
dehiscent +  and indehiscent +
persistent +, long +  and deciduous +
spheric +  and narrowly obovoid +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 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 +
smooth +  and tuberculate +
deciduous +  and persistent +
mucilaginous +
ridgelike +  and nipple--shaped +
in F. A. Wislizenus, Mem. Tour N. Mexico, +
triangular +
arillate +  and strophiolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
rugose +  and tuberculate +
spheric;obovoid +
tuberculate +
cluster +, arranged +  and radial +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
black +, brown +, reddish +, yellow +  and white +
curved +  and straight +
deciduous +
3mm +  and 150mm +
4 (?) +  and 38 (?) +
roughened +  and smooth +
acicular +  and subulate +
0.2 cm2 mm <br />0.002 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
decurrent +
unsegmented +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
yellow-green +  and dark green +
2cm;70cm +
tapering +, spheric +  and long cylindric +
0 cm0 mm <br />0 m <br /> (40 cm400 mm <br />0.4 m <br />) +
succulent +
1cm;15cm +
yellowish green +  and green +
tuberculate +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Echinocereus pectinatus +
Echinocereus +
species +
dull +  and glossy +
unbranched +  and branched +
epiphytic;epiphytic;epiphytic +
decumbent +, pendent +, sprawling +, ascending +  and erect +
barrel-shaped +  and spheric +