![]() ![]() The flowers are diurnal, yellow, with the base of the inner perianth segments orange coloured. The root is of the same dimension or slightly smaller of the aerial part.įlowers: Originates in the subterminal portion of the developing tubercles, not in the plant apex. Roots: Primary root fusiform, fleshy secondary roots fibrous. Spines: 0 up to 4, generally persisting in old tubercles, of 1 to 3 mm in length, semi-erect, rigid, the base is whitish with a dark-coffee apex. ![]() Epidermis verrucose, glaucous-green, covered by stigmas (squamiform peltate trichomes) of a greyish-white colour, covering almost the totality of the epidermis towards the base of the the tubercle.Īreoles: Dimorphic the spiniferous one are terminals, circular or elliptical, with white wool the floriferous one are located in the adaxial subterminal portion, separated from the spiniferous from 18 to 46 mm elliptical, with white wool, but noticeably larger than the spiniferous areoles. Tubercles: Cylindrical or occasionally triangular when young, of cartilaginous consistency, smooth, could appear similar in aspect to leaves, up to 190 mm in length and of 2 to 5 mm wide, some times the adaxial portion of the base of the tubercle is cuneate. Stem: Very reduced, shortly cylindrical, lacking ribs, with papyraceous bristles covering the collar and the stem apex, the bristles probably originate from the basal rest of the tubercles, the colour of the bristles of tubercles is coffee whit reddish tones, the stem bristle of plants growing in habitat rarely exceed the ground level. Description: Solitary or rarely clustered up to 19 of eight. ![]()
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