Echinocereus polyacanthus Engelmann 1848

giant claret-cup cactus, salmon-flowered hedgehog, spiny hedgehog

Echinopsis valida var. densa Regel 1852, Echinocereus polyacanthus var. densus (Regel) N. P. Taylor 1984 Cereus leeanus W. J. Hooker 1849, Echinocereus leeanus (W. J.

Hooker) Lemaire 1885 Cereus acifer Otto ex Salm-Dyck 1859, Echinocereus acifer (Otto ex Salm-Dyck) F. Haage 1859, E. polyacanthus subsp. acifer (Otto ex Salm-Dyck) N. P. Taylor 1997 Cereusphoeniceus [var.] pacificus Engelmann 1886, Echinocereus pacificus (Engelmann) F. Haage 1859, E. polyacanthus var. pacificus (Engelmann) N. P.Taylor 1984, E. polyacanthus subsp.pacificus (Engelmann) Breckwoldt 1996 Echinocereus durangensis Rümpler ex Förster 1886 Cereus huitcholensis F. A. C. Weber 1904, Echinocereus huitcholensis (F. A. C. Weber) Gürke 1906, E. polyacanthus var. huitcholensis (F. A. C. Weber) N. P. Taylor 1988, E. acifer subsp. huitcholensis (F. A. C. Weber) Lange 1994, E. polyacanthus subsp. huitcholensis (F. A. C.Weber) N.P.Taylor 1997 Echinocereus matthesianus Backeberg 1963, not validly published Echinocereus marksianus Schwarz ex Backeberg 1966 Echinocereus mombergerianus G. Frank 1990, E. polyacanthus subsp. mombergerianus (G. Frank) Breckwoldt 1996, E. pacificus subsp. mombergerianus (G. Frank) Blum & Rutow 1998 Echinocereus acifer subsp. tubiflorus W. Rischer 1998 Echinocereus santaritensis Blum & Rutow 1998, not validly published

Plants solitary or branched, often forming clumps of as many as 400 stems. Stems cylindrical, tapering toward the tips and bases, erect, bright to dark green, 10-30 cm (3.9-12 in) long, 2-7.5 cm (0.8-3 in) in diameter. Ribs 9-13, well defined, either tuberculate or even. Central spines 1-7, brown

Echinocereus polyacanthus subsp. polyacanthus

to yellow-brown, expanded basally, to 5 cm (2 in) long but variable in length. Radial spines 6-14, dirty white, often overlapping, to 2 cm (0.8 in) long. Flowers arising near the stem tips, tubular to funnelform, brilliant pinkish orange to deep red, with yellowish or whitish throats, 3-14 cm (1.2-5.5 in) long, 2-8 cm (0.8-3.1 in) in diameter. Fruits ovoid, green with white pulp, indehiscent. Distribution: Arizona and New Mexico, south through northern and central Mexico and into the Baja California Peninsula.

Echinocereus polyacanthus is variable and there is confusion about recognizing infraspecific taxa or not. Four subspecies are probably acceptable. Subspecies polyacanthus tends to be smaller flowered with flowers 3-7 cm (1.2-2.8 in) in diameter; it occurs throughout the range of the species. Subspecies acifer has flowers 6-8 cm (2.4-3.1 in) in diameter; it occurs in northern central and western Mexico. Subspecies huitcholensis has flowers 4.5-8 cm (1.8-3.1 in) in diameter; it occurs west of the Sierra Madre Occidental in western Mexico. Subspecies pacificus has fairly small flowers, to only 3 cm (1.2 in) long; it occurs in Baja California.

Echinocereus poselgeri

Echinocereus pseudopectinatus

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