hedeoma

from The Century Dictionary.

• noun A genus of chiefly low, herbaceous, aromatic plants, belonging to the natural order Labiatæ, tribe Satureineæ, characterized by its axillary clusters of small bluish flowers, in which the corolla is scarcely exserted from the calyx, and only two of the stamens are perfect.

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

• noun small genus of American herbs (American pennyroyal)