Echinopsis ID

[eddytrain]

Hi,

This plant is blooming for the first time, maybe it will help to identify it...

Thank you,
Eddy

[adetheproducer]

I think that's a matucana poltzi.

[esp_imaging]

I think it's an Echinopsis, probably a hybrid. No idea what!
It has too many ribs to be typical M. poltzi, the flower isn't orange enough and doesn't seem to be zygomorphic, plus it is produced from down the stem, not close to the growing point.

[adetheproducer]

Yes on a second look I did realise I missed the hairs on the flower stem, typically matucana do not have so many. Schoolboy error on my part.

[phil_SK]

Lobivia arachnacantha.

[vlani]

I second Phil. Red-flowering form of arachnacantha

[eduart]

Yes, probably Echinopsis arachnacantha var. torrecillasensis.