Echinocereus pentalophus

Plants branched, clumps to 20 × 100 cm. Stems weak, sprawling, soon decumbent [erect and rhizomatous], ± 10–60 × 1–2[–6] cm; ribs 4–5, crests sharp and straight to poorly defined and undulate; areoles 5–12 mm apart. Spines (3–)4–7(–9) per areole, usually very stiff and straight, yellowish, tan, ashy white to dark gray, or pale pink, tips dark, all terete; radial spines (3–)4–6(–8) per areole, spreading, 6–37 mm; central spines 0–1 per areole, porrect or ascending, 4–36(–60) mm. Flowers 6–10 × 7.5–10(–15) cm; flower tube 20–25 × 8–20 mm; flower tube hairs 3–6 mm; inner tepals brilliant pink or magenta distally with distinct white or yellow proximal regions of variable extent [very rarely white throughout], 3.5–6 × 9–18 mm, tips relatively thin and delicate; anthers orange-yellow; nectar chamber 3–6 mm. Fruits green, (10–)15–25 mm, pulp white. 2n = 22.

Echinocereus Pentalophus

Echinocereus pentalophus

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