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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:
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(0.2¢/heliophily index)
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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 Sonchus

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1 Heads 30-50 mm across in flower, the involucre (10-) 15-20 mm high; perennials from creeping rhizomes.
  2 Phyllaries and peduncles densely pubescent with glandular hairs; longer phyllaries 14-17 mm long
  2 Phyllaries and peduncles glabrous (but with sessile glands); longer phyllaries 10-15 mm long
1 Heads 15-25 mm across in flower, the involucre 9-13 mm high; annuals.
    3 Leaf base auricles rounded; mature achenes not transversely rugose
    3 Leaf base auricles sagittate, the two lobes on either side of the stem coming to a point; mature achenes transversely rugose