"P van Rijckevorsel" wrote in
:

Cereus-longispinus
Why does the name Cereus-longispinus have to have some hidden
meaning?

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Actually I am just looking at its face value, I certainly don't
want to delve into your personality

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Did you ever consider it might be an actual plant name?

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No, not really. A quick check suggests that it (leaving the hyphen
aside) once was published as a botanical name, but that it is not
in use, and probably has not been in the recent past.
PvR



Britton and Rose listed it as a synonym for Trichocereus chiloensis
in 1920. Current standing appears to be as a synonym for Eulychnia
breviflora.

Sean