Austrocylindropuntia

A species with cylindrical branched stems and short-lived leaves. Comparison of feral populations allows it to be distinguished from the much more strongly expanding Austrocylindropuntia subulata.

A mat-forming Andean cactus whose seeds germinated in light and darkness in a 2024 experiment. Prior seed-coat preparation is particularly significant for interpreting the results.

(K.Schum.) I.Crook, J.Arnold & M.Lowry

F.Ritter

An endemic of Peru's western slopes with upright stems, diamond-shaped tubercles and scarlet flowers. New sites from Ica shifted the documented southern limit of its range.

(Britton & Rose) Backeb.

A cactus with persistent awl-shaped leaves whose leaves and stems can assimilate CO₂ at different times of day. Its anatomy provides a particularly clear example of combining photosynthesis with water storage.

(Salm-Dyck) Backeb.