Echinopsis chiloensis

Scientific Name: Echinopsis chiloensis (Colla) Friedrich & Rowley
Synonym: Cactus chiloensis, Cereus chilensis var. quisco , Cereus chiloensis var. eburneus , Cereus chiloensis var. funkianus , Cereus chiloensis, Cereus chiloensis var. zizkaanus , Cereus funkii, Cereus quisco, Eulychnia eburnea, Trichocereus chilensis, Trichocereus chiloensis, Trichocereus chiloensis var. eburneus , Trichocereus chiloensis var. quisco , Trichocereus chiloensis var. zizkaanus , Trichocereus chiloensis var. funkii , Trichocereus funkii
Family: Cactaceae

Origin: Chile

Growth Habits: Tree cactus, up to 25 feet tall (8 m), stems 4 to 5 inches in diameter (10-12.5 cm); 10 to 17 low notched ribs; large whitish areoles, 0.8 inches apart (2 cm); spines yellowish at first, greyish later; 1 to 4 centrals, 2 inches long (5 cm) or more); 8 to 12 radials, up to 1.6 inches long (4 cm).

As Trichocereus chiloensis, in Britton and Rose's The Cactaceae

The original name for this cactus was Trichocereus chiloensis. In 1950, Skottsberg pointed that the name was misspelled, and was changed to "chilensis" for "Chile"+"ensis". The rules of nomenclature now, give priority to the original name, misspelling included, except if the name was changed by the original author. Thus, Friedrich & Rowley retained chiloensis when they included the genus Trichocereus into the genus Echinopsis.

Trichocereus chilensis var. borealis at Kuentz Nursery in early June

Blooming Habits:
White nocturnal flowers, up to 6 inches long (15 cm)