Potentilla basaltica - Tiehm & Ertter
Soldier Meadows Cinquefoil
Other Common Names: Soldier Meadows cinquefoil
Taxonomic Status: Accepted
Related ITIS Name(s): Potentilla basaltica Tiehm & Ertter (TSN 504572)
Unique Identifier: ELEMENT_GLOBAL.2.151977
Element Code: PDROS1B270
Informal Taxonomy: Plants, Vascular - Flowering Plants - Rose Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Rosales Rosaceae Potentilla
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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: Potentilla basaltica
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 22May2006
Global Status Last Changed: 10Mar1986
Rounded Global Status: G1 - Critically Imperiled
Reasons: Known only from two occurrences in southwestern Humboldt County, Nevada, and two occurrences in north-central Lassen County, California. The Nevada occurrences consist of about 85,000 individuals occupying no more than 27 ha of apparently suitable habitat. At least one of the California occurrences consists of 1000 plants over about 5 acres. All occurrences are vulnerable to noxious weed invasion and alteration of hydrology. Grazing occurs in the California occurrences. However, currently, all occurrences seem stable rather than declining. (2006).
Nation: United States
National Status: N1

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 California (S1), Nevada (S1)

Other Statuses

Comments on USESA: First placed on the candidate list in the February 21, 1990 Candidate Notice of Review. It was removed from the candidate list in the February 29, 1996 Candidate Notice of Review due to additional populations, individuals, and habitat. It was replaced on to the candidate list in the June 13, 2002 Candidate Notice of Review. In the August 2, 2013 Federal Register, Potentilla basaltica was removed from the Candidate list; "impacts to Potentilla basaltica from present or threatened destruction, modification, or curtailment of its habitat or range do not rise to a level of significance such that the species is in danger of extinction now or in the foreseeable future."
U.S. Fish & Wildlife Service Lead Region: R8 - California-Nevada

NatureServe Global Conservation Status Factors

Range Extent Comments: This species' range has two disjunct parts, In Nevada restricted to a 5 km-square area of Soldier Meadows in the northern Black-Rock Desert of southwestern Humboldt County. In California, known only from along Ash Creek in Ash Valley of north-central Lassen County. The full range extent at the California sites is estimated in 2005 as about 0.25 sq mi. (about 160 acres).

Area of Occupancy: 3-125 4-km2 grid cells
Area of Occupancy Comments: Occupied habitat in Nevada is restricted to about 27 ha. California occurrences are estimated to cover no more than 10 acres total.

Number of Occurrences: 1 - 5
Number of Occurrences Comments: Two known occurrences in southwestern Humboldt County, Nevada, and two occurrences,located closely together, in north-central Lassen County, California.

Population Size Comments: The Nevada occurrences are estimated to total about 85,000 individuals. One of the CA occurrences has at least 1000 plants; the other site is uncensused.

Number of Occurrences with Good Viability/Integrity: Few (4-12)
Viability/Integrity Comments: All of the known occurrences are estimated to have good or excellent viability.

Overall Threat Impact: Medium
Overall Threat Impact Comments: Current threats minimal in Nevada, mainly recreational use of habitat by bathers, hunters, and others, and some off-road vehicle use. Also vulnerable to water diversions and alteration of hydrology, and to competition with invasive weeds, especially tall whitetop (Lepidium latifolium). Invasive weeds have not yet reached the Nevada occurrences in significant amounts. Threats to the California occurrence are not yet documented, but may include water diversions, agricultural conversion, and invasive weeds. One California occurrence site is reported to be grazed and disturbed by the proximity of a jeep road. However, data from a 2002 field visit indicates there are still 1000 plants at this site and that the plants are stable "under current management."

Short-term Trend: Relatively Stable (<=10% change)
Short-term Trend Comments: Both states seem to have more or less stable occurrences.

Long-term Trend: Decline of <30% to increase of 25%
Long-term Trend Comments: Long term trend is assumed to be stable.

Intrinsic Vulnerability Comments: Occurrence at disjunct wetland sites in Nevada and California suggests that seeds might occasionally be dispersed between patches of suitable habitat via birds.

Environmental Specificity: Very narrow. Specialist or community with key requirements scarce.
Environmental Specificity Comments: Only known from alkaline meadows in small portion of California/Nevada desert.

Other NatureServe Conservation Status Information

Distribution
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Global Range: This species' range has two disjunct parts, In Nevada restricted to a 5 km-square area of Soldier Meadows in the northern Black-Rock Desert of southwestern Humboldt County. In California, known only from along Ash Creek in Ash Valley of north-central Lassen County. The full range extent at the California sites is estimated in 2005 as about 0.25 sq mi. (about 160 acres).

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 CA, NV

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CA Lassen (06035)
NV Humboldt (32013)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
16 Lower Quinn (16040202)+
18 Upper Pit (18020002)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: Perennial herbs from stout taproots; stems prostrate or decumbent; leaves mostly basal, linear, spreading, 5-12 cm long, pinnately divided into 7-18 pairs of leaflets, glaucous, glabrous or with a few fringing hairs when young; flowers in branched arrangements at ends of stems, petals 5, bright yellow, oval, longer than the green sepals, stamens 15-20, styles 3-10, smooth, 2.2-2.7 mm long; seeds (fruits) 1.9-2.2 mm long, brownish, surfaces with an obscure network of low ridges.
Palustrine Habitat(s): HERBACEOUS WETLAND, Riparian
Terrestrial Habitat(s): Grassland/herbaceous
Habitat Comments: Moist salt-crusted clay in alkaline meadows above, and outflow stream margins below, desert springs (often thermal), generally on flat to slight southeast aspects at elevations of 1330-1560 m, with Juncus balticus, Scirpus maritimus, S. acutus, Triglochin maritima, Distichlis spicata, Sisyrinchium halophilum, Nitrophila occidentalis, Carex spp., Pyrrocoma racemosa, Solidago spectabilis, Sphaeromeria potentilloides, Astragalus argophyllus, Lotus purshianus, Ericameria nauseosa, Sarcobatus vermiculatus, etc.
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: SIZE: at least 1000 maximum detectable individuals occupying at least 4 ha of apparently suitable habitat. CONDITION: multiple age classes present in ratios appropriate to generation time of element. Evidence of flowering and fruiting, seedlings, or other indications that reproductive mechanisms are intact. Less than 5% cover of exotic plant species. Less than 5% cover of significant anthropogenic impacts. LANDSCAPE CONTEXT: Surrounding area is relatively unfragmented and includes the ecological processes needed to sustain the element and its habitat.

Good Viability: SIZE: at least 500 maximum detectable individuals occupying at least 1 ha of apparently suitable habitat. CONDITION: multiple age classes present in ratios appropriate to generation time of element. Evidence of flowering and fruiting, seedlings, or other indications that reproductive mechanisms are intact. Less than 10% cover of exotic plant species. Less than 10% cover of significant anthropogenic impacts. LANDSCAPE CONTEXT: Surrounding area includes the ecological processes needed to sustain the element and its habitat, though it may be significantly fragmented, invaded by exotics, or otherwise impacted by humans.

Fair Viability: SIZE: at least 100 maximum detectable individuals occupying at least 0.5 ha of apparently suitable habitat. CONDITION: multiple age classes present, but often in ratios indicating reduced or irregular recruitment. Evidence of flowering and fruiting, seedlings, or other indications that reproductive mechanisms are intact. Up to 50% cover of exotic plant species and/or up to 50% cover of significant anthropogenic impacts. LANDSCAPE CONTEXT: Surrounding area may be heavily fragmented, disturbed, and/or invaded by exotics, but still includes the ecological processes needed to sustain the element and its habitat.

Poor Viability: SIZE: less than 100 maximum detectable individuals and/or less than 0.5 ha of apparently suitable habitat occupied. CONDITION: little or no evidence of successful or sustainable reproduction (poor age class distribution, no seedlings, and/or no evidence of flowering and fruiting, etc.). Cover of exotic plant species and/or significant anthropogenic impacts may exceed 50%. LANDSCAPE CONTEXT: Surrounding area may be heavily fragmented, disturbed, and/or invaded by exotics, with some or all ecological processes needed to sustain the element and its habitat no longer intact.
Justification: Existing EOs of this element likely include the best that will ever exist in the future, and no significant downward trends have yet been observed, so A-rank criteria are based on the sizes, conditions, and landscape contexts of the best existing occurrences. In general, population size (area of occupancy and abundance) is the primary factor influencing EO rank. Larger populations in higher quality sites are presumed to contain a higher degree of genetic variability, to have a lower susceptibility to the effects of inbreeding depression, and to be relatively resilient. Although no population viability data exist for this element, "D" ranked occurrences are estimated to have a very low probability of long-term persistence due to inbreeding depression, natural stochastic events, habitat degradation, and/or intrinsic vulnerability to human impacts. Because periodic climatic variation results in natural fluctuations in numbers of detectable individuals of this element, population abundance of an EO is based on the maximum observed abundance at that site while in its current overall condition and landscape context, unless an overall downward trend in abundance is apparent at that site. Significant anthropogenic impacts are those that reduce population size and/or viability for at least the next 25 years unless restored.

Key for Ranking Species Element Occurrences Using the Generic Approach (2008).
Date: 10Dec2004
Author: J. Morefield
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: 10Dec2004
NatureServe Conservation Status Factors Author: J. Morefield (NVHP); rev. R. Bittman 5/2005; rev. L. Morse (2006), rev. R. Bittman 2006

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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  • Cronquist, A., N.H. Holmgren, and P.K. Holmgren. 1997. Intermountain flora vol. 3, part A. Subclass Rosidae (except Fabales). Bronx: The New York Botanical Garden. 446 pages.

  • Flora of North America Editorial Committee. 2014b. Flora of North America North of Mexico. Vol. 9. Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York. xxiv + 713 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.

  • Knight, T.A. 1990. Status report for Potentilla basaltica Tiehm & Ertter. Carson City: Nevada Natural Heritage Program, prepared for the U.S. Fish and Wildlife Service, Reno.

  • Nevada Natural Heritage Program. 1986-present. Slide collection files. Carson City.

  • Nevada Natural Heritage Program. 1998-present. Index to available images (web page). Carson City: Nevada Natural Heritage Program public web site, http://heritage.nv.gov/images.htm.

  • Tiehm, A. and B. Ertter. 1984. Potentilla basaltica (Rosaceae), a new species from Nevada. Brittonia. 36: 228-231.

  • Tiehm, A., and B. Ertter. 1984. Potentilla basaltica (Rosaceae), a new species from Nevada. Brittonia 36(3): 228-231.

  • U.S. Fish and Wildlife Service (USFWS). 2004. Species assessment and listing priority assignment form. Potentilla basaltica. 14 pp.

  • U.S. Fish and Wildlife Service. 2013. 12-Month Finding and Candidate Removal for Potentilla basaltica; Proposed Threatened Species Status for Ivesia webberi. Federal Register 78(149): 46889-46897.

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