Seymeria cassioides(J.F.Gmel.) S.F.Blake

Yaupon black sennayaupon blacksenna

WFO wfo-0001136608 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Seymeria cassioides, photographed by Lauren McLaurin
fig. a Lauren McLaurin, CC BY 4.0 / 2021-10-03 / obs. 161489070
Seymeria cassioides, photographed by Shelby Lyn Sanders
fig. b Shelby Lyn Sanders, CC BY 4.0 / obs. 174737423
Seymeria cassioides, photographed by Brian Finzel
fig. c Brian Finzel, CC BY-SA 4.0 / obs. 91379587
Seymeria cassioides, photographed by Lauren McLaurin
fig. d Lauren McLaurin, CC BY 4.0 / obs. 88750203
Seymeria cassioides, photographed by Brandon Wheeler
fig. e Brandon Wheeler, CC0 1.0 / obs. 52444028
Seymeria cassioides, photographed by James (Jim) Duggan
fig. f James (Jim) Duggan, CC BY-SA 4.0 / obs. 61472158
Seymeria cassioides, photographed by Will McFarland
fig. g Will McFarland, CC BY 4.0 / obs. 26083298
Seymeria cassioides, photographed by Vincent Weber
fig. h Vincent Weber, CC BY-SA 4.0 / obs. 26062151

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 12 botanical countries

Regions where Seymeria cassioides is native: Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Texas, Virginia, Bahamas AlabamaArkansasFloridaGeorgiaLouisianaMississippiNorth CarolinaSouth CarolinaTennesseeTexasVirginia Bahamas
Native distribution of Seymeria cassioides, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Alabama ALA NORTHERN AMERICA
Arkansas ARK
Florida FLA
Georgia GEO
Louisiana LOU
Mississippi MSI
North Carolina NCA
South Carolina SCA
Tennessee TEN
Texas TEX
Virginia VRG
Bahamas BAH SOUTHERN AMERICA

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Also published as 4 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Afzelia cassioides J.F.Gmel.
  • Gerardia afzelia Michx.
  • Gerardia cassioides Pers.
  • Seymeria tenuifolia Pursh

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.