mugwort(n = noun.plant) - any of several weedy composite plants of the genus Artemisia;
is a kind of wormwood
is a member of genus artemisia
has particulars: artemisia gnaphalodes, artemisia ludoviciana, cudweed, prairie sage, western mugwort, white sage, artemisia vulgaris, common mugwort

   A somewhat aromatic composite weed (Artemisia vulgaris), at one time used medicinally; -- called also motherwort. [1913 Webster]

mugwort, n. any of various plants of the genus Artemisia, esp. A. vulgaris, with silver-grey aromatic foliage.

Etymology:
OE mucgwyrt (as MIDGE, WORT)

common mugwort, western mugwort