Echinocereus fasciculatus

(Engelmann ex S. Watson) L. D. Benson

Cacti Arizona ed. 3, 21. 1969.

Illustrated
Basionym: Mammillaria fasciculata Engelmann ex S. Watson Smithsonian Misc. Collect. 258: 118. 1878
Synonyms: Echinocereus engelmannii subsp. fasciculatus (Engelmann ex S. Watson) Blume & Mich. Lange Echinocereus fasciculatus va r. boyce-thompsonii (Orcutt) L. D. Benson Echinocereus fendleri var. robustus (Peebles) L. D. Benson Echinocereus rectispinus var. robustus Peebles
Treatment appears in FNA Volume 4. Treatment on page 165. Mentioned on page 161, 164.

Plants 5–30-branched, forming somewhat open clumps. Stems mostly erect, cylindric, (5–) 10–40 × 4.5–8 cm; ribs 10–15, crests slightly undulate; areoles 10–15 mm apart. Spines 8–16 per areole, usually straight, individual spines with broad zones of different colors: yellowish, reddish-brown, or gray to black, or white to black, becoming gray; radial spines 7–15 per areole, 5–15 mm; central spines 1–3 per areole, divergent-porrect, 15–75 mm, all terete. Flowers 6–10 × 8–10 cm; flower tube 10–20 × 15–40 mm; flower tube hairs 2.3–4 mm; inner tepals rose-pink to magenta [rarely nearly white], with midstripes darker, darker magenta or sometimes purplish maroon near base, (20–) 35–52 × 12–20 mm, tips relatively thin and delicate; anthers yellow; nectar chamber 3.3–5 mm. Fruits bright red or orange-red, 20–30 mm, pulp white or sometimes pink. 2n = 44.


Phenology: Flowering Mar–Jun; fruiting May–Jul.
Habitat: Sonoran Desert, flats to steep canyonsides, desert scrub, semidesert grasslands, interior chaparral
Elevation: [30-]600-1000(-1500) m

Discussion

New Mexico records of Echinocereus fasciculatus are at least in part based on vigorous old plants of E. fendleri, which sometimes have 1–2 short supplementary central spines (and which appear very different from younger plants in the same populations). Echinocereus fasciculatus may prove to intergrade clinally with E. engelmannii var. acicularis wherever their geographic ranges approach each other. At its upper altitudinal limit, E. fasciculatus tends to have shorter spines, fewer central spines, shorter stems, and more compact growth habit.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Echinocereus fasciculatus"
cushionlike +
circular to linear +
deciduous +  and persistent +
hourglass--shaped +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(Engelmann ex S. Watson) L. D. Benson +
hardened +
Mammillaria fasciculata +
triangular +
curved +  and straight +
divergent-porrect +
1.5 cm15 mm <br />0.015 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
proliferating +
flattened +  and cylindric +
mucilaginous +
undulate +
Ariz. +  and Mexico (Sonora) +
[30-]600-1000(-1500) m +
not separating +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
unisexual +  and bisexual +
2.6 cm26 mm <br />0.026 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
8cm;10cm +
orange-red;bright red +
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 />) +
Sonoran Desert, flats to steep canyonsides, desert scrub, semidesert grasslands, interior chaparral +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (5.2 cm52 mm <br />0.052 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 +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
smooth +  and tuberculate +
deciduous +  and persistent +
Flowering Mar–Jun +  and fruiting May–Jul. +
mucilaginous +
ridgelike +  and nipple--shaped +
Cacti Arizona ed. +
pink +  and white +
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 +
Illustrated +
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 +
straight +
deciduous +
3mm +  and 150mm +
8 (?) +  and 16 (?) +
roughened +  and smooth +
acicular +  and subulate +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 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 +
10cm;40cm +
cylindric +
0 cm0 mm <br />0 m <br /> (40 cm400 mm <br />0.4 m <br />) +
succulent +
4.5cm;8cm +
yellowish green +  and green +
tuberculate +
Echinocereus engelmannii subsp. fasciculatus +, Echinocereus fasciculatus +, Echinocereus fendleri var. robustus +  and Echinocereus rectispinus var. robustus +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Echinocereus fasciculatus +
Echinocereus +
species +
dull +  and glossy +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
epiphytic;epiphytic;epiphytic +
decumbent +, pendent +, sprawling +, ascending +  and erect +
barrel-shaped +  and spheric +