Alien begonia
From The Stargate Omnipedia
A plant discovered by an astrobiologist called Parrish on the mainland of M35-117, the new home of Atlantis. Parrish got very excited over it's discovery, due to it's similarity to an extinct earth plant called Begonia eiromischa. It had dark green leaves, "wooly" stalks and red flowers, and appeared to be able to survive in a climate it was not suited for.
KEY EPISODE
Remnants - Parrish gets excited over the discovery of this alien plant.