Amyris elemifera

Amyris elemifera was a plant which Guy Wildman had in his apartment. It had pale green leaves.

When Torchwood Three investigated the apartment, Sandra Applegate, using the alias Betty Jenkins, lied that she was a neighbour feeding his plants. (PROSE: Another Life)

Behind the scenes
In the real world, common names for amyris elemifera fittingly include "sea torchwood" and "smooth torchwood".