ianstrutt wrote: ↑Sat Jun 17, 2023 6:54 pmaccording to llifle maihueniopsis subterranea ssp. pulcherrima = puna subterranea f. incahuasi = cumulopuntia subterranea ssp. pulcherrima

That's disappointing: there is no validly published name for this in Puna.

The first is Stetsonia coryne.

You'll come across this under the name Cumulopuntia rossiana more often than pentlandii.

Can you not just use a mains-powered fan? Or use a transformer to power your PC fans? Solar seems a bit complicated and expensive.

Don't forget about Rob Bregman's while you're waiting. https://cactuspro.com/biblio/en:bregman

No, just a number.

Those Lincoln Giant betray an E. haematantha parentage, I think - some forms have similar spines.

edds wrote: ↑Tue May 23, 2023 6:27 pmI'm trying to breed some with more interesting spiny bodies as well so they look better when out of flower.

My most spiny [15px01]:

A spindly one of mine [15px04]. I kept a pair of seedlings and both have produced these sorts of flowers so far this year (not sure about previous years).

The pair of Matucana madisoniorum I posted on p1 of this thread are reposted below, together with an update - one survived and one didn't.

I got round to cutting my plant down this week, principally to make it easier to cut the hedge.