A few more opuntia flowers...

[Phil_SK]

And at the subterranea - as the label says, this was a cutting from Phil which went home with me after one Tephrocactus Study Group meeting:

Hmm. Why has your plant got twice as many flowers as my parent plant, despite mine being massive, nearly a foot across? Maybe I need to chop it up into a hundred little plants!

[Stuart Estell]

The microsphaerica is obliging nicely today:

[Christian]

Gosh, that's a stunningly deep shade of red, Stuart!

[Stuart Estell]

And some more - Maihueniopsis (now Cumulopuntia) subterranea v. incahuasi

[Stuart Estell]

Probably a form of Cumulopuntia rossiana? This plant came to me as "Maihueniopsis sp. red fl" but it's definitely not a maihueniopsis... I'll try to catch this flower open in the sun. If we have any.

[Stuart Estell]

A teeny-tiny Maihueniopsis ovata clone (minima/minuta/whatever) with huge flower to joint size ratio:

[Stuart Estell]

A Pterocactus megliolii clone not far off opening:

[Tony R]

A teeny-tiny Maihueniopsis ovata clone (minima/minuta/whatever) with huge flower to joint size ratio:

Yes, I have one of these open (yesterday's photo), looks a dead-ringer for your plant, M. minuta Rauh 65245:

[Stuart Estell]

They're amazing, aren't they? It reminds me a little of those leafcutter ants you see carrying massive leaves around.