pogostemon

from The Century Dictionary.

• noun A genus of gamopetalous plants of the mint family, order Labiatæ, and tribe Satureineæ, type of the subtribe Pogostemoneæ, and characterized by the four perfect stamens, which are protruding, distant, straight, and little unequal, and by the terminal roundish one-celled anthers, five-toothed calyx, four-cleft corolla with one lobe spreading, and the flowers close-crowded in large verticillasters, in an interrupted spike or panicle.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun genus of Asiatic shrubs or trees whose leaves yield a fragrant oil