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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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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 Malvastrum

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1 Leaves linear-lanceolate to lanceolate, 3.5-8× as long as wide; plant 1-5 (-8) dm tall; [calcareous habitat, inland provinces]
1 Leaves broadly lanceolate to broadly ovate, 1.5-2.5× as long as wide; plant (5-) 10-20 dm tall; [various habitats, Coastal Plain, mainly FL, TX, and LA, or as waifs].
  2 Hairs of the stems stellate with 5-12 rays; leaves sometimes shallowly 3-lobed
    3 Hairs of the stems with ascending rays, these not notably fused basally
    3 Hairs of the stems with rays appressed to the surface, the rays fused basally and thus sublepidote
  2 Hairs of the stems stellate with 2-5 rays; leaves unlobed.
      4 Mericarps with minute cusps, none longer than 0.1-0.4 mm long
      4 Mericarps with well-developed sharp cusps, the larger 1-2 mm long