cudweed

(noun) any of numerous plants of the genus Gnaphalium having flowers that can be dried without loss of form or color.

(noun) any plant of the genus Filago having capitate clusters of small woolly flower heads. Synonyms: cotton rose, filago.

(noun) perennial cottony-white herb of southwestern United States. Synonyms: western mugwort, white sage, prairie sage, Artemisia ludoviciana, Artemisia gnaphalodes.