"cottonweed" in the noun sense
1. pearly everlasting, cottonweed, Anaphalis margaritacea
an American everlasting having foliage with soft wooly hairs and corymbose heads with pearly white bracts
2. cottonweed
any of various plants of the genus Froelichia found in sandy soils and on rocky slopes in warmer regions of America grown for their spikes of woolly white flowers
Source: WordNet® (An amazing lexical database of English)
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