I let my daughter do her own "sleep thing"... she took no naps from about 9-12 months.... but once she started walking she started taking naps that lasted about an hour. She is the type of girl that will play, play, play happily and then go snuggle on the couch and crash... when she was 1 year she would often fall asleep on her own on the floor. I have never imposed a schedule based on "the norm" for other kids... each child is unique, and they will go through times when they need more naps, or less... That said... if I know she is close to her usual nap-time and we have to be somwhere within an hour or two of that time... i will ask her to take a nap and she is very good about going down if i get her all set up. at 12 months, if you can... just follow his "cues" as to whether he really needs a nap.
At 2.5 she take an afternoon nap that can last about 1-2 hours most days and then she sleeps 8-10 hours at night.
If he isn't tired or grumpy, try not giving him the morning nap. His alertness could be a signal that he doesn't NEED a nap right now. If you don't put him down in the morning and he is ok till his afternoon nap (even if it lengthens by a few minutes) keep it that way... If it leads to meltdowns... bring back the nap!
Good Luck!
-M.