mcvansoest said:But this one does have hairs... show me a cereus forbesii picture with hairs... This is a young plant that will get more ribs as it grows.
skopjecollection said:I still havent seen a pilosocereus with 4 ribs
skopjecollection said:And a lot of the photos do have hairs....depedning on how you want to look at it
According to my cactus reference (Anderson), there are 6 species of Pilosocereus which may have 4 ribs when mature (names available upon request), and yet more which may have 4 ribs when immature. I recommend relying on a reputable source to back up your own experience. Just because you haven't seen it doesn't mean that it doesn't exist.
No, there are no hairs in those last two pictures, no matter how you look at it (unless maybe you used a microscope). None.