Lophophora koehresii

State the treatment, not a verdict on growers

Kew lists Lophophora koehresii as a synonym of Lophophora diffusa. This is more precise than dividing taxonomists into national camps or calling a name simply “invalid.”

Kew · Lophophora diffusa ↗

Preserve the horticultural record

Keep koehresii on the received label, together with any documented seed-lot or locality information. A taxonomic synonym does not erase population differences or make all seedlings identical. Compare diffusa and the genus overview.