The second two look very much like Neoporterias to me. No idea what species, the genus used to be huge but has been reduced to just a few very variable species of Eriosyce.

The first one. Lobivia?

I have no idea what the first should be. The second one maybe Neochilenia (Neoporteria) jussieui (it has dirty-white flower). The third one is Eriosyce (horrida???). I love the last two.

Robi

I love black spined cactus, these are beautiful. Did you just get them? When buying seeds I always look for black spines in the description, also blue or purple skin.
Dan
Lincoln, NE USDA 5

Thanks Dan, yes I just got them.
I have a cactus with a purple blush on a blue-green body.

{{gwi:466593}}

I too love the black-spined Eriosyce and relatives. Also, those that turn purple in the sun are always fun:
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Ooooooooo, nice.

I just can't resist a black spined plant. Beautiful plants you all have.

Dawn

S&B!

What's that plant above? Notocactus ottonis v oxycostatus? Or not an ottonis? Thanks for your nice posting!

Robi

Kathy,

If you like those black-spined/purple bodied plants, you simply must get Neochilenia occulta, if you haven't already.

Oh, wait..........that's right - everything globular is either Echnopsis or Eriosyce, isn't it?

I have this plant as Notocactus oxycostatus, although it isn't clear to me how to reliably distinguish it from N. ottonis (except with seed and a microscope?). I can't find any reference to N. ottonis var oxycostatus, is there a new arrangement of the genus that I haven't seen?

Yes, I tried to find any mention of the ottonis relationship, but I didn't find, too. But I took a good look at all of my downloaded seedlist, and no results.