Flora of North America species comparison

mostly erect, cylindric, (5–)10–40 × 4.5–8 cm;

ribs 10–15, crests slightly undulate;

areoles 10–15 mm apart.

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.

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.

(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.

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.

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.

bright red or orange-red, 20–30 mm, pulp white or sometimes pink.

dark green to brownish, 2–3 cm, pulp white.

= 44.

= 22.