Leucostele undulosa is a species of Leucostele found in Chile.[1]
Leucostele undulosa has a columnar growth habit, achieving a height of up to 2.5m (08.2feet) and a trunk diameter of 11cm (04inches). Its dark green branches, measuring 15 centimeters in diameter, feature stems with 20 ribs and obovate gray areoles, each 2mm high and 8mm in diameter. Within these areoles, 3-4 central spines, measuring 4cm (02inches) in length, exhibit a white hue with brown markings, accompanied by 12 radial spines measuring 1cm (00inches) in length, displaying a spectrum from dark green to white with brown spots.
This plant produces 3–10 subapical white flowers, measuring 13cm (05inches) in length and 6cm (02inches) in diameter. The green fruits, 3cm (01inches) in diameter and 2.5cm (01inches) long, feature abundant axillary gray hairs. Notably, Leucostele undulosa is similar to Leucostele skottsbergii but stands out with its darker green branches, more ribs, a thicker and different color spines.[2]
Indigenous to Coquimbo, Chile, this species is found at altitudes of 400m (1,300feet), specifically in low scrub areas and on rocks alongside Puya species.[2]
The nomenclature of this species is based on the undulating shape of its ribs, producing a tuberculate appearance.[2]