Botanical name: Eupatorium capillifolium    Family: Asteraceae (Sunflower family)
Synonyms: Artemisia capillifolia, Eupatorium foeniculaceum, Eupatorium foeniculoides

Dog Fennel is a herbaceous perennial weed, 4 to 5 feet, with finely dissected leaves that are strong smelling when crushed. Minute, greenish-white, somewhat insignificant flowers bloom in late summer. The small, 3-5 flowered heads are numerous and arranged in large, leafy, pyramid-shaped branch-end clusters. Fruits are are smooth achenes. The plant spreads by wind blown seeds and spreading rootstocks, sometimes to the point of becoming invasive. Dog Fennel is native to the USA, but has become naturalized in India and SE Asia. Flowering: September-November.

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The flower labeled Dog Fennel is ...