Corolla lobes purple to reddish-black, erectly spreading, 12-20 mm long, about 4-7 mm broad at the base, thence gradually tapering to a very acute apex, longitudinally folded outwards, with revolute margins, inside usually papillose, papillae with an apical horizontally curved thick hair. Corolla campanulate, 20-27 mm in diameter, glabrous and pale green outside, with the tips, margins and a stripe down the middle of the lobes and some dots on the tube very dark purple-brown inside minutely papillate-setulose on the lobes and upper part of the tube, rich velvety black-purple on the lobes, pale yellowish dotted with blackish purple in the tube, which is 3-6 mm long and as much in diameter. Sepals 2-4 mm long, ovate, acuminate, glabrous. Pedicels 2-3 mm long, glabrous, holding the flower horizontally. Inflorescence: Flowers in fascicles of 4–15 or more, along the grooves between the angles, usually near the stem tips in the upper 2/3 of the stem.įlowers: Flowers bisexual, regular, 5-merous. Leaves: Rudimentary, forming the tubercle tooth stipular denticles absent. Tubercles 5-20 mm long, conical, spreading, fused near base into the irregularly arranged angles, glabrous, light green, faintly glaucous, armed with stout, yellowish, hard-pointed acute spines 6-12 mm long, with the apical half of the spines brown. Branches, erect, glabrous, green, sometimes mottled with purple-brown, 15–50 cm tall and 18–36 cm thick, very variable, short and very compact, sometimes with robust tubercles, or slender-stemmed, irregularly or spirally 4–6-angled. Stems: Branching from a single, central stem, erect from base. The inner lobes are shortly erect, incumbent on the anthers, and exceed them.The odour of the flowers is extremely disagreeable.ĭerivation of specific name: The name refers to the stout tubercles with brown apices (From Lat.
The corona is stipitate (held on a stalk), dark purple-brown, The outer lobes are erect, bifid, fused to the bases of the inner lobes that form pouches. The corolla is 20-27 mm across, the tube is yellow and purple-spotted. Bunches of 3-15 velvety purple-brown flowers appears in autumn in the upper 2/3 of the stem, and open simultaneously, but are seldom seen in culture. The leaves are transmuted into hard thorns. Description: Quaqua mammillaris is a much-branched, robust succulent shrub, up to 50 cm high, and 50-70 cm across, branched in a bushy manner which root from the primary stem only.
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