Echinocereus poselgeri

Lemaire

Cactées, 57. 1868.

Common names: Pencil cactus dahlia hedgehog cactus sacasil
Illustrated
Synonyms: Echinocereus tuberosus (Poselger) Rümpler Wilcoxia poselgeri (Lemaire) Britton & Rose
Treatment appears in FNA Volume 4. Mentioned on page 96, 158, 159, 172.

Plants straggling, very tall and slender, sparingly branched at any level. Stems initially erect, later sprawling or clambering, long cylindric, 12–60 (–130) × 0.6–1 (–2) cm; ribs 8–10, crests low, uninterrupted or shallowly undulate; areoles 1–2–5 mm apart. Spines (9–) 11–13 (–17) per areole, stiff and straight, usually tan, brown, or black, sometimes yellow, pale-pink, ashy white, or gray, sometimes black central spines contrasting with white radial spines; radial spines 8–16 per areole, 2–5 mm; central spines 1 (–3) per areole, closely appressed (except at the stem tip), terete, 4–9 mm. Flowers 3.5–6 × 3.5–7 cm; flower tube 15–20 × 7–18 mm; flower tube hairs 3–5 (–10) mm; inner tepals rose-pink with darker-pink to magenta midstripes, proximally darker, 25–35 × 4–12 mm, tips relatively thin and delicate; anthers yellow; nectar chamber 1–4 mm. Fruits dark green to brownish, 2–3 cm, pulp white. 2n = 22.


Phenology: Flowering Mar–Apr; fruiting 2 1/2-3 months after flowering.
Habitat: Tamaulipan thorn scrub, alluvial soils
Elevation: 0-200[-1100] m

Distribution

V4 333-distribution-map.gif

Tex., Mexico (Coahuila), Mexico (Nuevo León), Mexico (Tamaulipas)

Discussion

Echinocereus poselgeri, with tuberous roots and erect, slender, elongate stems, superficially resembles some Peniocereus species. The polyphyletic genus Wilcoxia Britton & Rose formerly included this species along with species of Peniocereus. The flowers, fruits, and seeds of E. poselgeri are typical for Echinocereus, quite similar to those of E. reichenbachii.

Selected References

None.

Lower Taxa

None.

"-5mm" is not declared as a valid unit of measurement for this property."thin" is not a number.

... more about "Echinocereus poselgeri"
cushionlike +
circular to linear +
deciduous +  and persistent +
hourglass--shaped +
Allan D. Zimmerman +  and Bruce D. Parfitt +
Lemaire +
hardened +
triangular +
curved +  and straight +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
proliferating +
flattened +  and cylindric +
Pencil cactus +, dahlia hedgehog cactus +  and sacasil +
mucilaginous +
uninterrupted +
undulate +
Tex. +, Mexico (Coahuila) +, Mexico (Nuevo León) +  and Mexico (Tamaulipas) +
0-200[-1100] m +
not separating +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (6 cm60 mm <br />0.06 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 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 />) +
0.7 cm7 mm <br />0.007 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
3.5cm;7cm +
dark green;brownish +
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 />) +
Tamaulipan thorn scrub, alluvial soils +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 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 +
darker-pink +  and magenta +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
smooth +  and tuberculate +
deciduous +  and persistent +
Flowering Mar–Apr +  and fruiting 2 1/2-3 months after flowering. +
mucilaginous +
ridgelike +  and nipple--shaped +
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 />) +
white +, gray +, ashy white +, pale-pink +, yellow +, black +, brown +  and tan +
straight +
deciduous +
3mm +  and 150mm +
8 (?) +  and 16 (?) +
roughened +  and smooth +
acicular +  and subulate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 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 +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
yellow-green +  and dark green +
12cm;60cm +
clambering;sprawling;erect +
cylindric +
0 cm0 mm <br />0 m <br /> (40 cm400 mm <br />0.4 m <br />) +
succulent +
0.6cm;1cm +
yellowish green +  and green +
tuberculate +
Echinocereus tuberosus +  and Wilcoxia poselgeri +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Echinocereus poselgeri +
Echinocereus +
species +
dull +  and glossy +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
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 +