Euphorbia rosescens - E.L. Bridges & Orzell
Rosy-pink Spurge
Other English Common Names: Scrub Spurge
Taxonomic Status: Provisionally accepted
Unique Identifier: ELEMENT_GLOBAL.2.734624
Element Code: PDEUP0Q400
Informal Taxonomy: Plants, Vascular - Flowering Plants - Spurge Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Euphorbiales Euphorbiaceae Euphorbia
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Concept Reference
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Concept Reference: Bridges, E. L. and S. L. Orzell. 2002. Euphorbia (Euphorbiaceae) section Tithymalus subsection Inundatae in the southeastern United States. Lundellia 5:59-78.
Concept Reference Code: A02BRI01HQUS
Name Used in Concept Reference: Euphorbia rosescens
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 21Jan2005
Global Status Last Changed: 21Jan2005
Rounded Global Status: G1 - Critically Imperiled
Reasons: Fewer than 20 known sites and probably fewer than 1000 plants total in the 11 extant populations; endemic to highly restricted habitat which is being rapidly developed in Florida.
Nation: United States
National Status: NNR

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 (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Found only in Highlands County on Lake Wales Ridge - very narrow range in highly endangered Florida scrub community on the southern end of the Lake Wales Ridge - map given in Bridges and Orzell shows about 600 square km (60km X 10 km) (Bridges and Orzell 2002)

Area of Occupancy: 1-125 4-km2 grid cells
Area of Occupancy Comments: Probably occupies small areas at each site (pers obs -Ann F. Johnson).

Number of Occurrences: 6 - 20
Number of Occurrences Comments: 11 sites seen within last 20 yrs (6 verified around the year 2000 and 5 found by Christman in 1988 scrub survey), plus 3 historical sites (checked around 2000 and not found) and 2 herbarium sites not checked (Bridges & Orzell 2002).

Population Size Comments: Marsha, Carl Weekley's assistant at Archbold Biological Station reports three populations of over 100 plants each on the Station (pers. comm, 2005).

Number of Occurrences with Good Viability/Integrity: Few (4-12)
Viability/Integrity Comments: According to FNAI database species is found on Lake Wales Ridge Wildlife and Environmental area in addition to Lake Apthorpe Scrub (TNC) and Archbold Biological Station mentioned by Bridges and Orzell (2002). However, the Lake Wales Ridge Wildlife and Environmental Area consists of a series of single lots and species may not be in one of the purchased lots.

Overall Threat Impact: Very high - high
Overall Threat Impact Comments: Natural uplands on Lake Wales Ridge are rapidly being developed as land values in that portion of Florida have recently risen steeply; existing scrubs are becoming overgrown due to lack of fire.

Short-term Trend: Decline of 10-30%
Short-term Trend Comments: Bridges and Orzell (2002) mention 3 previously known sites could not be re-located.

Long-term Trend: Unknown

Intrinsic Vulnerability Comments: Probably naturally resilient due to a deep rootstock from which it re-sprouts following above-ground disturbances (Ann F. Johnson).

Environmental Specificity: Narrow. Specialist or community with key requirements common.
Environmental Specificity Comments: Low areas where seasonal mositure is available surrounded by deep white sands of oak scrub or rosemary balds on Lake Wales Ridge- tolerates some disturbance - often found in sand roads through scrub.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Found only in Highlands County on Lake Wales Ridge - very narrow range in highly endangered Florida scrub community on the southern end of the Lake Wales Ridge - map given in Bridges and Orzell shows about 600 square km (60km X 10 km) (Bridges and Orzell 2002)

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)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
03 Kissimmee (03090101)+, Western Okeechobee Inflow (03090103)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: Somewhat succulent, blue-green herb with milky juice, about one foot tall growing from an underground woody rootstock about 1 cm in diameter and 15 cm long; leaves elliptic to oblanceolate or obovate-spatulate; the largest leaves borne at mid-stem, about 4 cm long and 1-2 cm wide, strongly ascending to somewhat spreading; bracteal leaves progressively reduced upwards, ovate, generally as broad as long; all leaves deep green with a narrow pinkish-purple margin; cyathia 4-6 mm broad, 3-5mm high; rose pink to purple near the base and greenish at apex. Distinguished from the related E. floridana by broader stem leaves which are not reflexed and do not abruptly contrast with ovate bracteal leaves on inflorescence and larger cyathia (4-6 mm broad vs 3-5 mm) (Orzell and Bridges 2002).
Terrestrial Habitat(s): Shrubland/chaparral
Habitat Comments: "Xeric oak and pine scrub, mostly on white sands, disturbed habitats; 20-50 m" (Flora of North America Editorial Committee 2016).  Sand pine-oak scrub (Wunderlin and Hansen 2011).
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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Excellent Viability: More than 100 plants in good quality habitat, with fruit and flowers if observed at appropriate season.
Good Viability: 25-100 plants in good quality or undisturbed habitat, with fruit and flowers if observed at appropriate season.
Fair Viability: 10-25 plants good quality habitat, with fruit and flowers if observed at approporiate season or numerous to abundant but in an average quality habitat.
Poor Viability: Fewer than 10 plants or several to abundant but in a low quality habitat.
Date: 11Jan2005
Author: Ann F. Johnson
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: 10Jan2005
NatureServe Conservation Status Factors Author: Ann F. Johnson

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
  • Bridges, E. L. and S. L. Orzell. 2002. Euphorbia (Euphorbiaceae) section Tithymalus subsection Inundatae in the southeastern United States. Lundellia 5:59-78.

  • Flora of North America Editorial Committee. 2016. Flora of North America North of Mexico. Vol. 12. Magnoliophyta: Vitaceae to Garryaceae. Oxford Univ. Press, New York. xxiv + 603 pp.

  • Wunderlin, R.P. and B.F. Hansen. 2011. Guide to the Vascular Plants of Florida, 3rd edition. University Press of Florida, Tampa. 800 pp.

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