This entire plant is poisonous, with the exception of the fleshy red arils surrounding the seeds. I had heard them described as "edible and sweet", so I tried one. It was definitely edible, but its hint of sweetness did little to combat its overwhelmingly slimy goopiness. Overall: not a pleasant dining experience.
Thanks for the info, Matt, I didn’t know it’s poisonous. I sometimes take pictures of the plant, it looks so festive.