Echinocereus pseudopectinatus

(N. P. Taylor) N. P. Taylor

Bradleya 7: 74. 1989.

Basionym: Echinocereus bristolii var. pseudopectinatus N. P. Taylor Gen. Echin ocereus, 120, figs. A–C (p. 119). 1985
Synonyms: Echinocereus scopulorum subsp. pseudopectinatus (N. P. Taylor) W. Blum & Mich. Lange
Treatment appears in FNA Volume 4. Mentioned on page 173.

Plants unbranched (rarely few branched). Stems erect, short cylindric, to 20 × 4–6 cm; ribs 13–19, crests slightly undulate; areoles 4–8 mm apart. Spines 13–17 per areole, stiff and straight, white, pink, or gray, becoming gray with dark tips; radial spines 12–17 per areole, appressed to spreading, 2–12 mm; central spines (0–) 1–4 per areole, projecting, 1–4 mm. Flowers 5–8 × 7–10 cm; flower tube 15–25 × 8–20 mm; flower tube hairs 3–5 mm; inner tepals purplish-pink, darker proximal portion and midstripes, 35–45 × 10–22 mm, tips relatively thin and delicate; anthers dark yellow; nectar chamber to 3 mm. Fruits dark green, brownish tinged, 15–23 mm, pulp white.


Phenology: Flowering times not well known; fruiting 2 months after flowering.
Habitat: Chihuahuan Desert, desert scrub, mostly semidesert grasslands, rocky slopes, mostly igneous substrates
Elevation: 1200-1400 m

Discussion

Misidentifications of Echinocereus pseudopectinatus were the basis for Arizona reports of E. pectinatus and E. dasyacanthus, which belong to an unrelated species group from the Chihuahuan Desert. Formerly, E. pseudopectinatus was considered conspecific with E. bristolii W. T. Marshall, a closely related endemic species of Sonora, Mexico.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

dark yellow +
cushionlike +
circular to linear +
deciduous +  and persistent +
hourglass--shaped +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(N. P. Taylor) N. P. Taylor +
hardened +
Echinocereus bristolii var. pseudopectinatus +
triangular +
curved +  and straight +
variously angled +  and flattened +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
proliferating +
flattened +  and cylindric +
mucilaginous +
undulate +
Ariz. +  and Mexico (Sonora) +
1200-1400 m +
not separating +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
unisexual +  and bisexual +
2.6 cm26 mm <br />0.026 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
7cm;10cm +
brownish tinged;dark green +
dehiscent +  and indehiscent +
persistent +, long +  and deciduous +
spheric +  and narrowly obovoid +
1.5 cm15 mm <br />0.015 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
Chihuahuan Desert, desert scrub, mostly semidesert grasslands, rocky slopes, mostly igneous 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 +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
smooth +  and tuberculate +
deciduous +  and persistent +
Flowering times not well known +  and fruiting 2 months after flowering. +
mucilaginous +
ridgelike +  and nipple--shaped +
3.5 cm35 mm <br />0.035 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
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 +
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 />) +
gray +, pink +  and white +
straight +
deciduous +
3mm +  and 150mm +
appressed +  and spreading +
12 (?) +  and 17 (?) +
roughened +  and smooth +
acicular +  and subulate +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 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 +
0cm;20cm +
cylindric +
0 cm0 mm <br />0 m <br /> (40 cm400 mm <br />0.4 m <br />) +
succulent +
4cm;6cm +
yellowish green +  and green +
tuberculate +
Echinocereus scopulorum subsp. pseudopectinatus +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Echinocereus pseudopectinatus +
Echinocereus +
species +
dull +  and glossy +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
epiphytic;epiphytic;epiphytic +
decumbent +, pendent +, sprawling +, ascending +  and erect +
barrel-shaped +  and spheric +