#1 Definitely F. glaucescens

I don't think the Melocactus is matanzanus. I have one that looks very similar to yours, with the chevrons between the ribs, which has been identified as M. bahiensis.

Second one P. pachycladus

M. haageana?

Mammillaria glassii What makes you think that? In M. glasii central spines are same colour and barely distinguishable from radial spines, while the plant on the pictures above has brown, hooked central spines tipical of M. bocasana . Are they hooked spines? I couldn't make it out, which made me dou...

FWIW, whereas most of my collection is in an unheated (though fleece-lined greenhouse) I keep all my Ferocacti, S. pruinosis and P. magnifica indoors in a cool room. https://www.llifle.com/Encyclopedia/CACTI/ is a good place to find out tolerance to cold for each variety.

nachtkrabb wrote: ↑Wed Oct 04, 2023 3:53 pm Hallo Gillinger,
that's a real nice Matucana madisonorum. Interesting with those long spines, never seen that before.
Is this a special variety?
Nachtkrabb

Hey Nachtkrabb. Sorry, only just seen this. Thanks. It was identified to me as "horridispinum", which makes perfect sense!

Well it took until 1st October to flower, but finally -

Thanks for all the replies. I think I'm settled now on M. matuae.

anttisepp wrote: ↑Tue Sep 05, 2023 8:13 am No, it cannot be rubrograndis at all, M. r. has completely other appearance, flattened stem and other spines.

I agree. Matudae is looking the more likely. Maybe it just needs to grow a bit. Flowers might help but that won't be this year now.

I managed to get in touch with the person I got it from and she says she thinks it's M. rubrograndis. From photos on the internet this doesn't seem likely. Any thoughts on that?

I've just acquired this plant, which was only marked as a Mammillaria. After a lot of searches I came up with M. sphaerica as a possible. Can anyone please confirm? Thanks.

Can anyone confirm that each of these are varieties of Echinopsis oxygona? Searches seem to show a wide range of forms for this particular species. Thanks.

4 looks like a monstrose version of Mamm. gracilis

Thanks for the replies. I'll follow those up