I have one similar to the 2nd labeled Gymnocalycium mihanovichii, although it's much more purple than the one you have (possibly in stronger light?)

See the front plant in this thread

Mark

The reason for the bud looking more purple than yellow can be seen with this picture of the flower from the side (it's just closing up for the day). You do wonder how a plant that small can produce a flower so large.
[attachment 4250 NotoUebel4_1.jpg]

Phil,

Thanks for that. I have a plant labelled titanota which at the moment doesn't look too similar - but it's still young and agaves seem to be very different in their juvenile and adult phases.

Mark

Looking at Desert Tropicals it appears that uebelmannianus flowers can be yellow or purple - guess I have the yellow one. Noto Uebelmannianus When it was in bud I thought it was going to be purple - it obviously just loves to deceive you. [attachment 4249 NotoUebel3_1.jpg] The last photo is one I go...

Bill Wrote:
-------------------------------------------------------
> Thanks for sharing Mark.
>
> That first caudex in the looks like a reclining
> figure or a mermaid.

If you ask me it's more impressive than the mermaid they make all the fuss about over there.

Mark

I make no apologies for posting this one again
[attachment 4226 Cacti002_1.jpg]

Not much to say on this one - mamms just seem to keep flowering with no effort.
[attachment 4225 M2_1.jpg]

This is only a small plant, only has one flower, but it has been going for over a week.
[attachment 4224 N1_1.jpg]

The weather is awful, but some of the plants still want to make an effort.

A great contrast between spine and flower colour.

[attachment 4223 M1_1.jpg]

And just to show that they can grow [s]weeds[/s] Opuntias outside
[attachment 4222 Copenhagen064_1.jpg]