Botanical placement
Kew places this name under Echinopsis lageniformis. A plant encountered in a market outside Bolivia is not, by itself, evidence of a native population there.
Habit and distinguishing characters
The 1920 account describes a branching columnar plant with pale-green, slightly glaucous stems, four to eight ribs and a few very unequal yellowish spines. Compare the full pattern of stem, areole and spine characters. A single long spine or a blue surface cannot settle a cultivated plant’s parentage.
Britton & Rose · The Cactaceae, volume 2 (1920), pp. 134–140 ↗
Black spots need an assessment
Do not label every dark lesion “bridgesii black rot” or assume one pathogen. Record whether tissue is firm or collapsing, whether damage spreads, and what changed in watering, temperature or handling. Use the cactus health guide →
Cold reports are context, not guarantees
Cold tolerance depends on the plant, exposure duration, moisture and previous conditions. Protect plants from unfamiliar cold; track your own conditions and damage.