Armatocereus laetus
Scientific Name: Armatocereus laetus (Kunth) Backeb. in Backeb. & F.M.Knuth
Synonym: Cactus laetus, Cereus laetus, Lemaireocereus laetus
Family: Cactaceae
An antique photo, as Lemaireocereus laetus in Britton and Rose's The Cactaceae
Origin: Northern Peru
Growth Habits: Columnar plants branching from the base, up to 20 feet tall (6 m); branches narrow during the dry season, giving the appearance of being made of independant joints; 4 to 8 ribs; areoles 0.8 inches apart (2 cm); 12 spines
Flower and fruit
Blooming Habits:
Nocturnal summer white flowers, 2 inches in diameter (5 cm), 2.5 inches long (6 cm)
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