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Key to Zamia

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1 Petiole armed with stout prickles; leaflets 25-50 mm wide, thick and rigid; seed cone cylindrical, > 3× as long as wide
1 Petiole unarmed; leaflets 5-16 mm wide, firm but flexible; seed cone ellipsoid to subglobose, < 2.5× as long as wide.
  2 Median leaflets 5-16 mm wide, lacking protruding vein-tips at the acute to obtuse apices; leaflets 10-18× as long as wide; leaves to 10 dm long; older plants variously multi-stemmed or not; [collectively more widespread in FL].
  2 Median leaflets 12-16 mm wide, with protruding vein-tips appearing as small teeth at the rounded apices; median leaflets 12-16 mm wide; leaflets averaging 8× as long as wide; leaves to 15 dm long; older plants multistemmed, forming large clumps; [ne. FL, from St. Johns County (or se. GA?) south to Brevard County]