Stenocereus treleasei, commonly known as tunillo,[2] is a species of flowering plant in the family Cactaceae, native to Oaxaca in Mexico.

Branches are dark to bluish green with a diameter of up to 22 cm (8.7 in) and 15 to 20 blunt and slightly curved ribs.

[2] By being able to grow a fruit makes the species part of the Magnoliophyta phylum and the plant seed group of Angiosperms.

When food is scarce the bat will eat the fruits produced from columnar cacti, including Stenocereus treleasei.

It forms part of the thorn-scrub and tropical dry forests in valleys and slopes in soils derived from volcanic rocks and limestones.

In some areas, S. treleasei becomes the dominant component in the plant associations called pitayeras or tunillales by local people.

[6] Researchers in Venezuela analyzed cell anatomy of 22 columnar cacti species, including S. treleasei.