Matucana polzii Diers et al., Kakteen And. Sukk. 37:114. 1986 ?;
Duars : cactus-03 : Notocactus sp. ? : 4 posts by 2 authors. Attachments (2).
This cactus looks somewhat similar to
Looks like Matucana probably polzii the flower is zymorphic so not notocactus.
Thank you very much once again, for the ID and explaining the difference.