Succulent forming broad spreading clump up to 0.5 m diam. or more, rooting freely near bases of side-branches. Stems 50-200 mm long, 15-30 mm thick, decumbent, grey-green mottled with purple; tubercles 3-15 mm long, deltoid, conical to laterally flattened, arranged loosely into 4-5 angles along stem (not always clearly into angles), each tipped with blunt to sharp grey to yellow and hardened tooth, mostly without stipules. Inflorescences of 3-10 ± simultaneously opening flowers towards apex of stem; pedicel 1-2 mm long, 0.75-2.00 mm thick, ascending to spreading with flowers mainly facing horizontally; sepals 1.5-2.5 mm long, 1 mm broad at base, pale green, ovate-lanceolate, acuminate, adpressed to corolla. Corolla 8.0-28.5 mm diam., campanulate (rarely rotate); outside uniformly pale yellow to purple-red or maroon on lobes changing to pale green to white speckled with purple-brown towards base; inside tube usually cream or white sometimes with bands of dark purple on white, mouth of tube and lobes speckled with purple-brown on yellow to uniformly dark purple-black, sometimes with upward-pointing bristles in mouth of tube and on base of lobes, otherwise glabrous and smooth; tube 2.0-5.5 mm long and ± as broad at mouth, broadly to deeply cupular, corolla thickened around mouth; lobes 6-15 mm long, 3.5-4.5 mm broad at base, ascending to spreading, tapering from base to acute apex (rarely narrowing abruptly at apex to acute tip), folded longitudinally along middle so that upper surface often keeled. Corona 2.3-3.0 mm diam., purple-or red-brown or purple-black becoming yellow towards base, raised on very short stipe; outer lobes ±0.5-1.0 mm long, erect, shallowly to deeply bifid into erect deltoid lobules, laterally fused to bases of inner lobes to form deep pouch around guide-rails; inner lobes ±0.5 mm long, adpressed to backs of and usually exceeding anthers, rectangular, truncate to emarginate, dorsiventrally flattened, with erect deltoid or truncate ridge-like or low and rounded dorsal projection in series with outer lobes.
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A succulent plant. It forms clumps 50 cm across. The side branches form roots. The stems are 5-20 cm long by 1.5-3 cm thick. They are grey-green and mottled purple. The flowers are yellow to brown.
Like Q. mammillaris but mat-forming and rooting on branches, stems 20-30 mm diam., with fewer and blunter teeth and mottled with purple, flowers often brown to yellowish.
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