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Key to Argythamnia

Euphorbiaceae

Argythamnia

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1 Mid and upper cauline leaves petiolate, the petioles 1-18 mm long.
  2 Staminate petals fused to the androphore; nectary glands of the pistillate flowers oblate, 0.2-0.3 mm long × 0.3-0.4 mm wide; [of pine rocklands and rockland hammocks in s. FL]
  2 Staminate petals free from the androphore; nectary glands of the pistillate flowers linear to oblong, 0.3-1.5 mm long × 0.3-0.4 mm wide; [e. TX and OK westward and southward, rare waif eastward in SC].
    3 Stigmas flattened; staminate sepals 2.4-3.3 mm long; stipules persistent; seeds smooth to rugose or papillate
1 Mid and upper cauline leaves sessile.
      4 Nectary glands of pistillate flowers wider than long, ovate to oblong in shape.
      4 Nectary glands of pistillate flowers much longer than wide, linear in shape.
          6 Nectary glands of both pistillate and staminate flowers glabrous; [AR, OK, TX, and KS westward]