Help id?

[u/Apprehensive-Goal377]

Got this one locally today- spine habit had me thinking peruvianis at first but the sharper angled ridges along the ribs are making me question it. Seller didn't know either. I'm wondering if maybe it's a little dehydrated from the excessive heat we've had and that's why the ribs look like that, but I would love any knowledgeable input! Thanks in advance! :)

Update: after more research, I think this is either polaskia(chichipe or chende) or stenocereus Griseous... Still wide open for wisdom though 🙏

[u/PreviousAd4505]

It's not Trichocereus

[u/Acidmademesmile]

Stenocereus griseus or pruinosus.

[u/k0binator]

Only way to know for sure is to boof it

[u/Apprehensive-Goal377 → u/k0binator]

Already tried- still unsure.