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1 Plants perennial or biennial, 3-30 dm tall; rays 12-60. | |
2 Fruits 2-6 mm long, 1.7-3.5 mm broad; corollas white; [either native, NY, NJ, PA, w. VA, w. NC, and s. IN northward, or exotic and widespread]. | |
3 Fruits 2-2.5 mm long; plant from a thickened taproot; [collectively common plant of mostly disturbed areas] | |
4 Plants annual (or sometimes a short-lived perennial in Anthriscus) from fibrous roots; flowering Apr-Jun; [of rich forests or weedy situations]. | |