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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
Write-in vote: vote
We've set a goal of recruiting 200 ongoing supporters to donate $15 or more each month in 2025. Please help us reach this goal and make next year's flora even better:

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 Casuarina

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1 Leaves (teeth in whorls at each node) 6-8 per node, lacking a brown transverse band at or above the base of the teeth; longitudinal ridges of branchlets sharply angular; plant monoecious; branchlet segments 5-8 (-13) mm long, 0.5-0.7 (-1) mm in diameter
1 Leaves (teeth in whorls at each node) 7-14 (-17) per node, with a brown transverse band at or above the base of the teeth; longitudinal ridges of branchlets flattened or rounded; plant dioecious; branchlet segments 8-20 mm long, 0.9-1.2 mm in diameter
  2 Leaves (teeth in whorls at each node) 7-10 per node, with a brown transverse band above the base of the teeth; branchlet segments 8-20 mm long, 0.4-0.7 mm in diameter
  2 Leaves (teeth in whorls at each node) 10-14 (-17) per node, with a brown transverse band at the base of the teeth; branchlet segments 8-20 mm long, 0.8-1.2 mm in diameter