Remember this tastyprawn post the other day about IDing the cactus that I agreed was probably a Cylindropuntia species? Well, I asked if anyone else had any ideas. I got one response:
It’s a monstrose form of one of the columnar cactus, possibly Pachycereus schottii monstrose.
I would challenge this based on the following observation: P. schotti montrose seems to entirely lack the elliptical tubercles that are omnipresent on Cylindropuntia and the specimen in the post.
While the lack of prominent spines is slightly problematic, a quick browsing of Google affirms that there certainly are a wide variety of spines or lack thereof. I wonder if I can find an expert to check this one out.