Echinopsis uyupampensis is a species of cactus found in Chile and Peru.
Echinopsis uyupampensis grows shrubby with several branches 1âÂÂ2 m long, 4âÂÂ8 cm diameter turning gray green with age. Stems have 7âÂÂ9 narrow and flat ribs that are not very high. The small areoles on them are light brown. From them spring eight to ten irregularly arranged spines, which are thickened at their base. The spines are black and brown with 7âÂÂ10 radial spines 2âÂÂ15 mm long and 3âÂÂ6 central spines 2âÂÂ8 cm long.
The funnel-shaped, pale yellow to white flowers are reddish on the outside, 13âÂÂ19 centimeters long, opening at night time. As with all Trichocereus the flower buds are covered with hairs. Fruits are 4 cm long and 3 cm in diameter.
Echinopsis uyupampensis is found at altitudes of around 400âÂÂ600 meters in Peru in the department of Arequipa, in the mountains of the lower Rio Tambo and in the Ilo region of department of Moquegua. The species is also found in Chile growing on cliffs in Arica and Parinacot.
The first description as Echinopsis uyupampensis by Curt Backeberg was published in 1936. The specific epithet uyupampensis refers to the occurrence of the species near Uyupampa in the Arequipa region of Peru. Heimo Friedrich and Gordon Douglas Rowley placed the species in the genus Echinopsis in 1974.