Is this a Noto?
Got this plant recently, labelled as Notocactus scopa v rubrispinus. Now it has flowered, I really don't know what it is. The flower colours would suggest a Noto, but I can't think of any Noto where the flowers come from the side of the plant, rather than the apex. The plant is in a 3" pot, making the flowers about 1.5" - 2" across.