Pachycereus militaris

Scientific Name: Pachycereus militaris (Audot) D.R.Hunt
Synonym: Backebergia chrysomallus, Backebergia militaris, Cephalocereus chrysomallus, Cephalocereus militaris, Cereus militaris, Mitrocereus chrysomallus, Mitrocereus militaris, Pachycereus chrysomallus, Pilocereus chrysomallus
Family: Cactaceae

Frost Tolerance: Although it comes from a year around warm area, it will take some frost for short periods

Origin: Mexico (Guerrero, Michoacan, Colima)

Growth Habits: Tree like columnar cactus, up to 60 feet tall (20 m), trunks up to 40 inches in diameter (1 m); areoles very close, often confluent; 11 to 14 ribs; 3-4 central spines, one longer up to 4 inches long (10 cm), 10-12 thin radials

Watering Needs: Little water in winter

As Pachycereus chrysomallus in Britton and Rose's The Cactaceae

Blooming Habits:
Reddish to creamish nocturnal flowers, emerging from a brown woolly pseudo-cephalium, 2.4 to 2.8 inches long (6-7 cm). The wool falls after the fruits are ripe.