2024 Edition • Get the App • Cite this Page
X

Colors

Data mode

Account

Login
Sign up

Collapse this

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:
Donate $15 per month
(0.06¢/key line)
Donate $30 per month
(0.13¢/key line)
Donate $50 per month
(amazing!)
Donate another
or one-time amount

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 Tetragonotheca

Copy permalink to share

1 Pappi 0 or 1-10, < 0.6 mm long, subulate to acerose.
  2 Stems villous; ray blades 20-40+ mm long; cypselae 4-6 mm long; [widely distributed]
  2 Stems sparsely tomentulose or glabrous; ray blades 10-18 mm long; cypselae 2.5-4 mm long; [TX]
1 Pappi 16-30, 0.5-2 mm long, obovate to spatulate.
    3 Leaves mostly cauline; upper leaves connate-perfoliate; ray florets 12-13, with ray blades 8-18 mm long
    3 Leaves mostly basal; no leaves connate-perfoliate; ray florets 16-21+, with ray blades 20-30+ mm long