Kelmina root
From The Stargate Omnipedia
Plant found on P4S-237 in the Milky Way Galaxy. It acts as a powerful and fast-acting sedative, used by Ellori's people.
KEY EPISODE
Prophecy - Natania drugs two Jaffa guards with kelmina root in order to free Jack O'Neill and Teal'c from Mot's prison, quickly knocking out the large warriors.