I would beg to differ—a bullet remaining in a wound is often of significant consequence. Even though I'm no surgeon, there may still be something I can do for you, should you wish it.

I have been through the Oxygen Garden fairly extensively and I do not recall a plant of that description, unfortunately. What type of poison is it?

[Although whatever it was, Snape did not have the proper ingredients to brew the antidote for either common or uncommon poisons, as powdered horn of Unicorn or Graphorn, as well as stewed Mandrake and bezoars were in rather short supply here in outer space.]