Dicerandra cornutissima - R.B. Huck
Longspurred Mint
Other English Common Names: Longspur Balm
Other Common Names: longspur balm
Taxonomic Status: Accepted
Related ITIS Name(s): Dicerandra cornutissima R.B. Huck (TSN 196113)
Unique Identifier: ELEMENT_GLOBAL.2.141499
Element Code: PDLAM0F060
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mint Family
Image 10409

© Alfred R. Schotz

 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Lamiales Lamiaceae Dicerandra
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Dicerandra cornutissima
Conservation Status
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NatureServe Status

Global Status: G2
Global Status Last Reviewed: 09Nov2017
Global Status Last Changed: 09Nov2017
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G2 - Imperiled
Reasons: Dicerandra cornutissima is endemic to Florida and occurs in Marion and Sumter Counties. There are twelve extant occurrences with a minimum of 37,902 clumps and a maximum number of 43,563. Habitat loss because of development and exotic species competition are among the most important threats to Dicerandra cornutissima. However, the large core population is protected on a managed area. Active management of the habitat is ongoing on Marjorie Harris Carr Cross Florida Greenway.  Little is known on this species' response to fire and the effects of timber management and other vegetation management (mowing). Some of these could benefit the species but no data is available to support that.
Nation: United States
National Status: N2

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Florida (S2)

Other Statuses

U.S. Endangered Species Act (USESA): LE: Listed endangered (01Nov1985)
U.S. Fish & Wildlife Service Lead Region: R4 - Southeast

NatureServe Global Conservation Status Factors

Range Extent Comments: Dicerandra cornutissima is endemic to Florida and occurs in Marion and Sumter Counties.

Area of Occupancy: 6-25 4-km2 grid cells
Area of Occupancy Comments:  

Number of Occurrences: 6 - 20
Number of Occurrences Comments: There are 12 extant occurrences (FNAI 2017).

Population Size Comments: A minimum number of 37,902 clumps and a maximum number of 43,563 clumps of Dicerandra cornutissima plants were documented in 2016-2017 (FNAI 2017).

Number of Occurrences with Good Viability/Integrity: Few (4-12)
Viability/Integrity Comments: Eight of 12 EOs with good viability (FNAI 2017).

Overall Threat Impact: High
Overall Threat Impact Comments: Rapidly developing area, prime habitat for development. Only 5 out of the 12 EOs are receiving protection (on the Marjorie Harris Carr Cross Florida Greenway) and only 2 of the 5 have good viability. The subdivisions are continuously expanding and Dicerandra cornutissima is being lost because of development, exotic species, and trash dumping. The population of plants along the I-75 corridor are facing exotic plant, rutting, and mowing issues. Fire requirements are unknown (FNAI 2017).

Habitat loss because of development and exotic species competition are among the most important threats to Dicerandra cornutissima.

Short-term Trend: Relatively Stable (<=10% change)

Long-term Trend: Decline of 30-80%

Intrinsic Vulnerability Comments: Little is known on this species' response to fire and the effects of timber management and other vegetation management (mowing).  Some of these could benefit the species but no data is available to support that.

Environmental Specificity: Narrow. Specialist or community with key requirements common.
Environmental Specificity Comments: Dicerandra cornutissima occurs requires sandy openings specifically in sandhill and scrub.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Dicerandra cornutissima is endemic to Florida and occurs in Marion and Sumter Counties.

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States FL

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
FL Marion (12083), Sumter (12119)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
03 Oklawaha (03080102)+, Withlacoochee (03100208)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A pungently aromatic, low shrub from a woody taproot. Leaves are opposite, needle-like, mostly ascending, with margins that are sometimes slightly wavy. The inflorescence appears as a narrow system of axillary clusters, each with 1-5 flowers. Flower petals are rose-purple, strongly 2-lipped, about 13 mm long. (Based on Kral 1983.)
Terrestrial Habitat(s): Forest/Woodland, Shrubland/chaparral, Woodland - Conifer
Habitat Comments: Scattered in openings (natural or artificial) in longleaf pine-turkey oak scrub/sandhill or on low rises in slash pine-palmetto scrub. (Based on Kral 1983.)
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 08Nov2017
NatureServe Conservation Status Factors Author: Cooper, S., D. Hardin; rev. D.L. White (1990), rev. Herring, B. J., NeSmith, C. C., and Jenkins, A. M. (2017)

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Huck, R.B. 1984. Systematics and evolution of Dicerandra (Labiatae). Doctoral dissertation, Dept. of Biology, University of North Carolina, Chapel Hill. 502 pp.


  • KRAL, R. 1983.A REPORT ON SOME RARE,THREATENED,OR ENDANGEREDFOREST-RELATED VASCULAR PLANTS OF THE SOUTH.VOL I ISOETACEAETHROUGH EUPHORBIACEAE;VOL II AQUIFOLIACEA THROUGH ASTERACEAE& GLOSSARY.USDA FOREST SERV,SE REG.,ATL,GA. TECH PUBL R8-TP2

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Kral, R. 1983c. A report on some rare, threatened, or endangered forest-related vascular plants of the South. U.S. Dept. of Agriculture Forest Service Technical Publication R8-TP2, Athens, GA. 1305 pp.

  • U.S. Fish and Wildlife Service (USFWS. 1985. Determination of endangered status for two Florida mints. Federal Register 50(212): 45621-45624.

  • U.S. Fish and Wildlife Service. 1987. Endangered status for Warea amplexifolia (wide-leaf warea). Federal Register 52(82): 15501-15505.

  • WUNDERLIN, RICHARD P. 1982. GUIDE TO THE VASCULAR PLANTS OF CENTRAL FLORIDA. UNIV. PRESSES OF FLA., TAMPA, ST. PETERSBURG, FT. MEYERS, SARASOTA

  • Wunderlin, R.P. 1982. Guide to the vascular plants of central Florida. Univ. Presses Florida, Gainesville. 472 pp.

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