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Support the Flora of the Southeastern US

2024 has been a banner year for making the best flora we can imagine. We've created:
With financial support from people like you, we are aiming even higher in 2025. Together we can accomplish all this: Vote on our 2025 priorities
  • Add Global Conservation Ranks (GRanks) vote
  • Professional graphic keys (polyclaves) to individual families/genera vote
  • 2 new FloraQuest apps: Florida & Mid-South vote
  • Image overlays highlighting diagnostic characters with arrows vote
  • iNaturalist integration in FloraQuest vote
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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Ulmaceae

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1 Leaves strongly 3-veined from the base, the venation otherwise pinnate; fruit a drupe with thin flesh
1 Leaf venation pinnate throughout, the venation strictly pinnate; fruit dry, a samara (flat and winged) or nutlike (with or without fleshy protuberances).
  2 Fruit a samara (flat and winged); primary lateral veins mostly parallel and unforked to the leaf margin
  2 Fruit nutlike (globular, with or without fleshy protuberances); primary lateral veins either mostly parallel and unforked to the leaf margin, or mostly forking before reaching the margin.
    3 Fruit with numerous fleshy protuberances; primary lateral veins mostly forking before reaching the margin; [small trees of swamp forests of the Coastal Plain from se. NC and SC southward]
    3 Fruit lacking fleshy protuberances (though irregular in shape); primary lateral veins mostly parallel and unforked to the leaf margin; [planted horticulturally, rarely persisting or spreading weakly]