Pilosocereus collinsii aka Pilosocereus Collinsii

Pilosocereus collinsii is a tree-like cactus. It belongs to the Cactaceae family. It comes from southern Mexico, but sources differ on its range. Kew lists Oaxaca. Useful Tropical Plants lists Chiapas as well. It grows in tropical woods that shed their leaves, and in thickets. Kew places it in the desert or dry shrubland biome. These records show where it grows wild. They do not show tested needs in a garden.

This spiny plant stores water and is a succulent. It grows to about 10 feet [3 metres] tall. Its stems stand upright and form columns, with few branches. The long, thin branches measure 0.10–0.13 feet [0.03–0.04 metres] across. Useful Tropical Plants calls it an evergreen tree. The sources give no size range just for garden plants. They give no spread or full account of its leaves. Its tree-like shape and slim branches are its main known traits.

People gather this cactus from the wild for local food. The sources list only the fruit as safe to eat. Each fruit is about 0.10 feet [0.03 metres] across. Useful Tropical Plants rates its food value as fair. The records do not say when to pick the fruit. Nor do they say how to prepare it. They give no flower shape or bloom time for this species. The RHS describes flowers of the genus, not this species. Those traits do not show how this cactus flowers.

The species records say little about how to grow it. Useful Tropical Plants says growers can raise it from seed. It gives no seed-sowing steps or more details on growth. The sources do not set out light, soil, or water needs. Nor do they give a frost limit or hardiness zone. They list no pests or diseases for this species. Useful Tropical Plants reports no known hazards or uses as medicine. This does not prove it is safe for people or pets.

Useful Tropical Plants cites a 2017 IUCN review: Least Concern. It reports a small range but many plants in the wild. That account found no major threats at the time. The sources use different names, which may make naming plants hard. The RHS gives Cephalocereus collinsii as another name for it. LLIFLE instead places Pilosocereus collinsii under Pilosocereus purpusii. This profile keeps the name asked for. It draws on records for that species.