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dull yellow, frequently tinted greenish or bronze, often with midstripes of brownish or dull pink; outer filaments greenish; anthers bright-yellow; stigma

(requiring verification), ca. 2.5–2.8 mm. Fruits greenish white (drying yellow-green) to partly or wholly tinted with dull reddish-brown, usually 1.5–2 times

substrate. Roots diffuse. Stems unsegmented, gray-green to yellowish or bronze-tinted green, spheric to short cylindric, 5–10 (–24) × (1.8–) 2.5–6.5 (–8) cm,

fringed; inner tepals ca. 11–26 per flower, generally white, cream, pale tan, greenish white, or pale-rose-pink, midstripes usually ± sharply defined (sometimes

12 or more, ending in sweet potatolike swellings, 10–15 × 4–7 cm. Stems greenish brown to brown, branched, 25–75 (–100) cm, distally 6 mm diam., at midlength

yellow-green to distally tinted pink to magenta; anthers yellow, sometimes bearing stigma-tipped, stylelike appendages; style greenish yellow to often pink

to 20 m. Bark gray-brown with orange tint, furrows shallow, ridges flat, broad. Branchlets redbrown to light greenish brown, glabrous or with a few trichomes;

angled toward apex of plant, 9–17 mm. Flowers: outer tepals whitish with greenish midvein; inner tepals bright-rose-pink, almost magenta, without darker

dark golden yellow, pale greenish yellow, translucent dull yellow, or saffron yellow, proximally reddish, often bronze tinted proximally or in vague midstripes

(–16) per areole, straight, straw colored, ± translucent, often glassy white tinted with yellow, darkest spines sometimes tan or brown; radial spines 7–14 per

usually dark red, purple, or deep beet-red, less commonly almost green or greenish red, leafless at least distally, large and robust. Bracts narrowly spathulate

crenulate lateral wings; flowers 3.5-6 mm > 4 4 Pseudostaminodes blunt, brown tinted (often observed as darkened flower tips), usually not recurved; bracteoles

Two-year-old branchlets slender (ca. 5 mm thick or less); twigs at first greenish brown to red-brown, often glaucous; leaves ca. 1 mm wide, not or only slightly

only slightly tapering bases, tardily ripening, fleshy, surfaces red with greenish to reddish pulp > 16 15 Plants small trees or shrubs; fruits barrel-shaped