id help

[Benyellow]

Please help id this, it has very dense spines.

[greenknight]

Thelocactus?

[Benyellow]

The ribs does shape like a Thelocactus, could be one of the species, but I can't find an exact match, how big Thelocactus will grow before flowering?

[jfabiao]

I would rather say Weingartia. If it is, it is probably big enough to flower.

[esp_imaging]

I would rather say Weingartia. If it is, it is probably big enough to flower.

It looks 100% South American to me. Weingartia is a good call, I think.

[Benyellow]

Thanks a lot guys, this is the first time I've heard of Weingartia, first in my collection

[iann]

Weingartias are floriferous, in summer, and not especially difficult to grow. They're probably more common than you think, but not fashionable at the moment. They might be found labelled as Rebutia, or sometimes not labelled at all

[DaveW]

DNA studies show the genera Sulcorebutia and Cintia are now better submerged into Weingartia rather than all in Rebutia as the new Cactus Lexicon lumped them, Weingartia being the oldest name available for this group.

Marlon Machado (Brazilian botanist doing DNA studies) said on the BCSS site:-

"the former genera Sulcorebutia, Weingartia and Cintia form another group distinct from Rebutia sensu stricto; however, species of these three former genera do not form distinct groups themselves but are intermixed, thus should be united as belonging to a single genus, the oldest genus name of the three being Weingartia."

Weingartia sensu stricto was a fairly characteristic group of species in the main:-

https://www.google.co.uk/search?q=Weing ... cQ_AUIBigB" onclick="window.open(this.href);return false;

[7george]

Weingartias are floriferous, in summer, and not especially difficult to grow.

I'm not sure if they will bloom without some cold rest, in a tropical climate.