Dicerandra

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Dicerandra
Endangered Garretts mint flower (5794258452).jpg
Dicerandra christmanii
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Lamiaceae
Subfamily: Nepetoideae
Tribe: Mentheae
Genus: Dicerandra
Benth
Synonyms [1]

CerantheraElliott 1821 not P. Beauv. 1808 nor Raf. 1819

Contents

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. [1] [2] 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, [3] 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. [4]

The phylogenetics of this genus have been studied before; first by Robin Huck in 1987, who described Section Dicerandra, which includes all species with standard-lobed corollas and exserted stamens, and section Lecontea which includes D. odoratissima and D. radfordiana that have cucullate-lobed corolla species with inserted stamens. [5] Subsequent studies by plant systematists at the University of Florida have confirmed these sections, in addition to discovering a potential chloroplast capture event in Dicerandra immaculata var savannarum. [3]

Ecology

Dicerandra species are found along ancient sand-hill habitats in the southeastern US. [3] Northern, annual taxa occur mostly on acidic white sand that are remnants of ancient shorelines during the Pleistocene. Southern perennials either occur on red sands along the Lake Wales Ridge or on white sands along the Atlantic coast. They prefer open habitats free from tree cover and rapidly draining soils. Some, like Dicerandra cornutissima, have been reported along Interstate 75 where frequent machine clearing have provided a suitable habitat. [5]

Species

[1]
  1. Dicerandra christmanii Huck & Judd = Dicerandra frutescens var. christmanii(Huck & Judd) D.B.Ward
  2. Dicerandra cornutissima Huck = Dicerandra frutescens var. cornutissima (Huck) D.B.Ward
  3. Dicerandra densiflora Benth. - northern Florida
  4. Dicerandra frutescens Shinners - scrub mint - central Florida
  5. Dicerandra fumella Huck - Florida panhandle, southern Alabama
  6. Dicerandra immaculata Lakela - Lakela's mint = Dicerandra frutescens var. immaculata(Lakela) D.B.Ward
  7. Dicerandra linearifolia (Elliott) Benth. - coastal plain mint - southern Georgia, southern Alabama, northern Florida
  8. Dicerandra modesta (Huck) Huck = Dicerandra frutescens subsp. modestaHuck
  9. Dicerandra odoratissima R.M.Harper - rose balm - southern South Carolina, southeastern Georgia
  10. Dicerandra radfordiana Huck - Radford's balm - McIntosh County in Georgia
  11. Dicerandra thinicola H.A.Mill - Titusville mint = Dicerandra frutescens subsp. thinicola(H.A.Mill.) D.B.Ward

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<i>Scutellaria</i> Genus of flowering plants

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<i>Tiarella cordifolia</i> Species of flowering plant

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<i>Tiarella</i> Genus of flowering plants in the family Saxifragaceae

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<span class="mw-page-title-main">Lake Wales Ridge National Wildlife Refuge</span> United States National Wildlife Refuge in Florida

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<i>Conradina</i> Genus of flowering plants

Conradina is a genus of flowering plants in the mint family, Lamiaceae. Its common name is false rosemary, or rarely, short leaf rosemary. There are 7 species of Conradina, all native to the southeastern United States. Conradina verticillata grows on the Cumberland Plateau in Kentucky and Tennessee. The other five grow mainly in Florida. All of the species are closely related and there is some doubt about whether they are all separate. Most species occupy xeric habitats with well-drained soils composed of white sand. The genus Conradina was established by Asa Gray in 1870. It was named for the American botanist Solomon White Conrad.

<i>Pycnanthemum</i> Genus of flowering plants

Pycnanthemum is a genus of herbaceous plants in the mint family (Lamiaceae). Species in this genus are often referred to as "mountain mints" and they often have a minty or thyme-like aroma when crushed. All species of Pycnanthemum are native to the United States and Canada. The center of diversity for the genus is North Carolina with 13 of the 20 species having been collected therein. Nineteen of the 20 species of Pycnanthemum occur in the Eastern US and Canada, and one disjunct species occurs in California and Oregon.

<i>Dicerandra christmanii</i> Species of flowering plant

Dicerandra christmanii is a rare species of flowering plant in the mint family known by the common names Garrett's mint, yellow scrub balm, and Lake Wales balm. It is endemic to Highlands County, Florida, in the United States, where it is known from only four sites on the Lake Wales Ridge. All are contained within a tract of land measuring 6 kilometers by 3 kilometers. The plant is steadily declining due to the destruction and degradation of its habitat, and only one of the four occurrences is on protected land. It is a federally listed endangered species.

Dicerandra cornutissima is a rare species of flowering plant in the mint family known by the common name longspurred mint, longspurred balm, and Robin's mint. It is endemic to Florida in the United States. It is found in Marion County, and possibly Sumter County, but it may have been totally extirpated from the latter. There are 15 known occurrences remaining. The plant was federally listed as an endangered species in 1985.

<i>Dicerandra frutescens</i> Species of plant

Dicerandra frutescens is a rare species of flowering plant in the mint family known by the common names scrub mint and scrub balm. It is endemic to Highlands County, Florida, where it is known only from the Lake Wales Ridge. Its habitat is quickly being lost as it is converted to residential and agricultural use. It was federally listed as an endangered species of the United States in 1985.

<i>Dicerandra immaculata</i> Species of flowering plant

Dicerandra immaculata is a rare species of flowering plant in the mint family known by the common names Lakela's mint, Olga's mint, and spotless balm. It is endemic to Florida in the United States, where it is known only from Indian River and St. Lucie Counties. There are seven occurrences of the plant, two of which are scheduled for destruction as the land is cleared for development. The plant was federally listed as an endangered species in 1985.

<i>Perilla</i> Genus of flowering plants

Perilla is a genus consisting of one major Asiatic crop species Perilla frutescens and a few wild species in nature belonging to the mint family, Lamiaceae. The genus encompasses several distinct varieties of Asian herb, seed, and vegetable crop, including P. frutescens (deulkkae) and P. frutescens var. crispa (shiso). The genus name Perilla is also a frequently employed common name ("perilla"), applicable to all varieties. Perilla varieties are cross-fertile and intra-specific hybridization occurs naturally. Some varieties are considered invasive.

Dicerandra densiflora, the Florida balm, is a species of flowering plant in the mint family known by the common names scrub mint and scrub balm. It is native to North Central Florida, where it occurs along sand hill habitats. It is a member of the annual subclade of Dicerandra. D. densiflora grows up to 2 ft (61 cm) tall. Flower petals are lavender to purple in color with dark spots.

Dicerandra linearifolia, or coastal plain balm, is a species of Dicerandra native to the Southeastern Coastal Plain, United States.

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.

Dicerandra thinicola, known as Titusville mint, is a species of Dicerandra native to the Atlantic Coastal Ridge along the Central Florida coast. It is restricted to a 50-km range, and all known natural populations of D. thinicola are located in Brevard County, Florida, near the city of Titusville. Most populations are located on private lands with conservation easements. The Dicerandra Scrub Sanctuary was created in 2002 on public lands in order to protect populations of this species from human development.

<i>Tiarella austrina</i> Species of flowering plant

Tiarella austrina is a species of flowering plant in the family Saxifragaceae. The specific name austrina means "from the south". Being endemic to the southeastern United States, it is sometimes referred to as the southern foamflower. It is one of two species of Tiarella that spread by stolons.

References

  1. 1 2 3 Kew World Checklist of Selected Plant Families
  2. Biota of North America Program, 2013 county distribution maps
  3. 1 2 3 Oliveira, Luiz O.; Huck, Robin B.; Gitzendanner, Matthew A.; Judd, Walter S.; Soltis, Douglas E.; Soltis, Pamela S. (2007-06-01). "Molecular phylogeny, biogeography, and systematics of Dicerandra (Lamiaceae), a genus endemic to the southeastern United States". American Journal of Botany. 94 (6): 1017–1027. doi: 10.3732/ajb.94.6.1017 . ISSN   0002-9122. PMID   21636471.
  4. Huck, R. B. (2008). Dicerandra modesta (Lamiaceae): Raise in rank for a disjunct perennial in a new coastal clade in Florida. [ permanent dead link ]J Bot Res Inst Texas 2:2 1163.
  5. 1 2 Huck, Robin B. (1987). Systematics and Evolution of Dicerandra (Labiatae). Phanerogamarum Monographiae. Vol. 19. Schweizerbart. ISBN   978-3-443-78001-2.