Conradina brevifolia - Shinners
Shortleaf Rosemary
Other English Common Names: Short-leaved Rosemary
Taxonomic Status: Not accepted
Unique Identifier: ELEMENT_GLOBAL.2.128874
Element Code: PDLAM0D010
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mint Family
Image 10404

© Alfred R. Schotz

 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Lamiales Lamiaceae Conradina
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Concept Reference
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Concept Reference: NatureServe. Unpublished. Concept reference for taxa for which no reference which describes the circumscription has been recorded; to be used as a placeholder until such a citation is identified.
Concept Reference Code: UNDABI02HQUS
Name Used in Concept Reference: Conradina brevifolia
Taxonomic Comments: Synonymized within Conradina canescens by Kartesz (1994 checklist and 1999 synthesis), but federally listed as a distinct entity under name C. brevifolia by USFWS. Kartesz notes (pers. comm. to Larry Morse, 25Nov99) that he "has looked at a number of specimens, and cannot find constant characters to separate" C. brevifolia from C. canescens, concluding that "if they are distinct, morphology alone cannot be used to separate them."
Conservation Status
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NatureServe Status

Global Status: G2Q
Global Status Last Reviewed: 29Feb2000
Global Status Last Changed: 18Apr1991
Rounded Global Status: G2 - Imperiled
Reasons: The species has an extremely narrow range, with about 30 occurrences on the Lake Wales Ridge of central Florida. The species' habitat is being lost to agricultural conversion and development.
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 (12Jul1993)
U.S. Fish & Wildlife Service Lead Region: R4 - Southeast

NatureServe Global Conservation Status Factors

Range Extent Comments: Florida endemic, on Lake Wales Ridge, restricted to Highlands and Polk counties.

Area of Occupancy: 6-25 4-km2 grid cells
Area of Occupancy Comments: Less than 2000 hectares.

Number of Occurrences: 6 - 80
Number of Occurrences Comments: 32 recorded occurrences; 10 of them occur within 5 square miles. Only 30 are thought to be extant (2004).

Population Size Comments: Only very few populations with greater than 25 individuals.

Overall Threat Impact: Very high - high
Overall Threat Impact Comments: Habitat loss and degradation is the principle threat to this taxon. Habitat conversion into agriculture (citriculture), recreational, commerical and residential development result in habitat fragmentation. Overcollection (for horticulture), fire suppression, mowing, and off-road vehicles also threaten the few remaining populations of C. brevifolia.

Habitat conversion and development are projected to continue to cause decreases in the number of individuals and populations at potentially 25 of the 30 sites.

Short-term Trend: Decline of 10-50%

Long-term Trend: Decline of 30-50%
Long-term Trend Comments: Habitat conversion and destruction has been occurring since 1980.

Environmental Specificity: Very narrow to narrow.
Environmental Specificity Comments: Has a narrow geographic distribution on the Lake Wales Ridge.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Florida endemic, on Lake Wales Ridge, restricted to Highlands and Polk 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 Highlands (12055), Polk (12105)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
03 Kissimmee (03090101)+, Peace (03100101)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A perennial, aromatic shrub, growing to 1 m in height, from a woody root. Stems are highly branched. Leaves are linear, 4-8 mm long, and fleshy. Lavender flowers arise from the leaf axils.
Technical Description: Similar to C. canescens (in which it is included by Kartesz (1994 checklist) and others) but has shorter leaves: the larger leaves on well-developed flowering branches are 6.0-8.2 mm long, mostly shorter than the internodes, versus 7.0-20 mm long, mostly longer than the internodes for C. canescens. Conradina brevifolia also tends to have more flowers per axil than C. canescens: 1 to 6 per axil versus 1 to 3. (Martin 1993) The following is a description of C. canescens: leaves narrowly linear-oblong, the larger ones mostly not exceeding 10 mm long, conspicuously, densely, short gray-pubescent on both surfaces, the glandular punctae obscured by the pubescence; cymes usually 5-1-flowered, some of a given cyme in early bud stage when others are at anthesis or beyond, still others in intermediate stages of development; flower stalks 1 mm long or slightly longer; calyx about 5 mm long, densely and copiously short-pubescent and usually with numerous, long, spreading hairs as well; central portion of the lower lip of the corolla usually sparsely purple-speckled; stamen pairs subequal in length (Godfrey 1988).
Diagnostic Characteristics: see technical description.
Duration: PERENNIAL, Long-lived, EVERGREEN
Ecology Comments: Will not tolerate shading or soil disturbance (unpublished FNAI). Conradina spp. killed by fire but come back from seed (A. Johnson, FNAI, cited in Martin 1993).
Terrestrial Habitat(s): Shrubland/chaparral
Habitat Comments: White sands of sand pine-oak scrub of the Lake Wales Ridge (Polk, Highlands, and Osceola counties, Florida), occurring with many other endemics. Scattered overstory of sand pine and scrub oak.
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: 22Jun2004
NatureServe Conservation Status Factors Author: Russell, C., rev. D. White (1991), rev. M. Fellows (2004).
Element Ecology & Life History Edition Date: 10Feb1995
Element Ecology & Life History Author(s): M.E. STOVER, TNC-HO

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
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  • Brazis, D.M. No date. Center for Plant Conservation National Collection Plant Profile: Conradina brevifolia. Online. Available: http://ridgwaydb.mobot.org/cpcweb/CPC_ViewProfile.asp?CPCNum=1037. Accessed 2004.

  • Christman, S.P. 1988. Endemism and Florida's interior sand pine scrub. Final project report on project #GFC-84-101 to Florida Game and Fresh Water Fish Commission, Tallahassee, Florida. 247 pp. + maps, tables & appendices.

  • Godfrey, R.K. 1988. Trees, shrubs, and woody vines of northern Florida and adjacent Georgia and Alabama. Univ. Georgia Press, Athens. 734 pp.

  • 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.

  • NatureServe. Unpublished. Concept reference for taxa for which no reference which describes the circumscription has been recorded; to be used as a placeholder until such a citation is identified.

  • U.S. Fish and Wildlife Service. 1992. Proposed endangered status for three Florida plants of the genus Conradina. Federal Register 57(98): 21369-21374.

  • U.S. Fish and Wildlife Service. 1993. Endangered or threatened status for five Florida plants. Federal Register 58(131): 37432-37444.

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

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