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Key to Anacis

Asteraceae

Anacis

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1 Leaves (all) simple, the larger with 3 (-5 or more) lobes, but the leaf tissue al connected, not separated into separate leaflets); [IN, IL, MO, AR, and LA westwards]
1 Leaves (at least the larger, better developed, and lower on the stem) palmately or pinnately compound or 1-2× divided into separate leaflets or narrow divisions; [collectively widespread in our region].
  2 Leaves sessile (or with a short subpetiolar base < 2 mm long); plants 9-20+ dm tall
  2 Leaves with petioles 5-45 mm long; plants 2-9 dm tall.
    3 Leaves palmately 3-foliolate (rarely the leaves, especially the upper, simple, or with lower leaves 3-foliolate with the middle leaflet 2- or 3-lobed), the total number of leaflets or divisions thus (1-) 3 (-5), the middle leaflet of median leaves (2-) 5-30 mm wide
    3 Leaves palmately compound, the leaflets simple to lobed or pinnatifid, the total number of leaflets or divisions (3-) 5-25, the middle leaflet of median leaves 0.5-7 mm wide.
      4 Leaflets usually lobed (rarely simple), the total number of leaflets or divisions (3-) 5-11 (-15) per leaf, the segments of median leaves (1.5-) 2-7 (-9) mm wide
      4 Leaflets pinnatifid, the total number of leaflets or divisions 11-25 or more per leaf, the segments of median leaves 0.2-2 (-2.5+) mm wide.
        5 Midstem internodes 8-12 (-16) mm long; ultimate leaf lobes 1.0-1.5 (-2.5+) mm wide
        5 Midstem internodes 15-40 (-60) mm long; ultimate leaf lobes 0.5-1.0 (-2.0) mm wide