Dicerandra radfordiana

Last updated

Dicerandra radfordiana
Status TNC G1.svg
Critically Imperiled  (NatureServe) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Lamiaceae
Genus: Dicerandra
Species:
D. radfordiana
Binomial name
Dicerandra radfordiana
Dicerandra radfordiana exhibit at Callaway Gardens 20-01-026-callaway.jpg
Dicerandra radfordiana exhibit at Callaway Gardens

Dicerandra radfordiana, or Radford's balm, [2] is an annual species of Dicerandra native to Eastern Georgia. It is found along the Altamaha River bluffs where deep, well drained sands are common. Only two populations are currently known, with one on public land and another, on private land, where it is protected by a conservation easement. The size of each population varies from year to year depending on the amount of rainfall. [3]

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Dicerandra is a genus of flowering plants in the mint family. Dicerandra comprises 11 species: six perennial and five annual species. The perennials have narrow ranges in Central Florida with small population sizes and only occur on ancient dune ridges along the Lake Wales Ridge or the Atlantic coastal ridge; the annual species occur more broadly on sandhill habitats to the north. The perennials’ habitat has been severely fragmented due to human development over the past century. As a result, all perennial species except one are listed as federally endangered. Annual species of the clade have large ranges when compared to perennial members, with distributions of annuals ranging for hundreds of miles from the Panhandle of Florida to southeastern Georgia, with the exception of Dicerandra radfordiana which is endemic to two sites along the Altamaha river. The genus is characterized by hornlike spurs on their anthers.

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Dicerandra odoratissima, commonly known as the rose balm, is a species of Dicerandra native to the Southeastern Coastal Plain, with a geographic range that extends from eastern Georgia to southern South Carolina. Kral (1982) originally suggested that this species was so distinct from the remaining members of the genus that it should be placed in a separate section or a distinct genus. Today, D. odoratissima and its close relative D. radfordiana are members of the Lecontea clade.

References

  1. NatureServe (5 May 2023). "Dicerandra radfordiana". NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer. Arlington, Virginia: NatureServe. Retrieved 30 May 2023.
  2. USDA, NRCS (n.d.). "Dicerandra radfordiana". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 4 April 2017.
  3. "Dicerandra radfordiana" (PDF). Archived from the original (PDF) on 2015-09-05. Retrieved 2017-04-04.