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Key to Apiaceae, Key G: Apiaceae with leaves 2-4× pinnately-ternately compound, the ultimate leaflets broader than 1 mm wide and many >25) and often imperfectly separated from one another (clone); fruits glabrous, not ornamented

Apiaceae

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1 Plants perennial or biennial, 3-30 dm tall; rays 5-60.
  2 Fruits 5-15 mm long, 4-9.5 mm broad; corollas yellow (or white in Polytaenia albiflora); [native, IN, KY, TN, and AL westward]
  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; stem mottled with purple; [common plant of mostly disturbed areas]
    3 Fruits 4-6 mm long; plant from a cluster of fleshy roots or from a slender taproot; [either native, rare, and northern, or a rare waif]
      4 Plants biennial from a taproot, leaflets linear to linear-lanceolate; strongly aromatic (of caraway), particularly the fruit when crushed; [rare waif]
      4 Plants perennial from a cluster of fleshy roots; leaflets narrowly elliptic to lanceolate, not strongly aromatic; [rare native, of w. NC northwards]
1 Plants annual (perennial in Erigenia and sometimes Anthriscus), 0.5-8 (-10) dm tall; rays 1-7 (or to as many as 20 in Anthriscus and Aethusa).
        5 Plants perennial from a globose tuber; flowering Feb-Mar; [of rich forests]
        5 Plants annual (or sometimes a short-lived perennial in Anthriscus) from fibrous roots; flowering Apr-Jun; [of rich forests, open woodlands, grasslands, or weedy situations].
               8 Ultimate leaflets > 4 mm wide; [open woodlands and grasslands, c. TX]
               8 Ultimate leaflets < 4 mm wide; [non-native weed or waif or native from OH, KY, TN, AL westward]
                 9 Plants annual or rarely biennial; [non-native mostly east of Mississippi River]
                 9 Plants perennial from tubers; [native from OH, KY, TN, AL westward]