Erigeron piscaticus - Nesom
Fish Creek Fleabane
Taxonomic Status: Accepted
Related ITIS Name(s): Erigeron piscaticus G.L. Nesom (TSN 502391)
Unique Identifier: ELEMENT_GLOBAL.2.153121
Element Code: PDAST3M4X0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Erigeron
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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: Erigeron piscaticus
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 28Oct2013
Global Status Last Changed: 24Jan1991
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G1 - Critically Imperiled
Reasons: A species with a small range and populations size, that makes it susceptible to natural and man-made disturbances. Known from one canyon in Graham county, and possibly from a canyon in Pima County. Only about 80 plants were found at the Graham County site during surveys in 1993 and 1994. Extirpated from type locality in Maricopa County, and another canyon site in Graham County.
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 Arizona (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Endemic to Galiuro Mountains in Graham County, central Arizona where it is found in the Aravaipa Canyon vicinity; range 3 sq km. 1962 collection of an Erigeron from the Santa Catalina Mountains in Pima County, southern Arizona, was reassigned to E. piscatus and expands known range, however unknown if the species is extant there and will only be verified with new surveys of the area. Historical range is type locality (Fish Creek) in Maricopa County, and Turkey Creek, Galiuro Mountains.

Area of Occupancy: 1-25 4-km2 grid cells
Area of Occupancy Comments: Occupied range of known extant population in Aravaipa Canyon vicinity is about 1.6 sq km.

Number of Occurrences: 1 - 5
Number of Occurrences Comments: 1 known element occurrence but possibly 2 if species is relocated in Pima County through survey efforts. 2 historical occurrences including the type locality (last ob 1931).

Population Size Comments: Approximately 80 in the 1990s.

Number of Occurrences with Good Viability/Integrity: Unknown

Overall Threat Impact: High
Overall Threat Impact Comments: Small range and population size, make this species susceptible to natural and man-caused disturbances. Threats include trampling by recreationists, such as hiking and camping pressures, and poor watershed conditions that lead to flooding (AGFD 2001, 2011).

Short-term Trend: Relatively Stable (<=10% change)
Short-term Trend Comments: 1993 and 1994 surveys showed 79 plants both years in Oak Grove Canyon; population stable. Five collections known: two from Fish Creek in 1929 and 1931, two from Turkey Creek and vicinity in 1976 and 1979, and one from Box Canyon in 1962. A survey of the Turkey Creek and Fish Creek sites in 1990 by Gori et al. located no plants at Fish Creek and Aravaipai locations. In 1992, a similar survey of the Galiuro Mountains located 76 plants in Oak Grove Canyon and 11 in Turkey Creek, giving a total population of 87. Per Gori (1999), plants have been found and monitored annually in Oak Grove Canyon since 1992, with no other known extant locations.

Recently a 1962 collection from the Santa Catalina Mountains was re-assigned to E. piscatus, however no surveys have been conducted there, thus presence of this plant is uncertain.

Long-term Trend: Unknown

Environmental Specificity: Narrow. Specialist or community with key requirements common.
Environmental Specificity Comments: Moist sandy canyon bottoms associated with perennial streams; southwest riparian plant community. At one site, found on low terrace, with bare soil, annual grasses, herbs, walnut, alder, and little overstory. at another site, found on a higher terrace canyon wall, with walnut and juniper.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Endemic to Galiuro Mountains in Graham County, central Arizona where it is found in the Aravaipa Canyon vicinity; range 3 sq km. 1962 collection of an Erigeron from the Santa Catalina Mountains in Pima County, southern Arizona, was reassigned to E. piscatus and expands known range, however unknown if the species is extant there and will only be verified with new surveys of the area. Historical range is type locality (Fish Creek) in Maricopa County, and Turkey Creek, Galiuro Mountains.

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 AZ

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
AZ Graham (04009), Maricopa (04013)*, Pima (04019)*
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
15 Lower San Pedro (15050203)+, Rillito (15050302)+*, Lower Salt (15060106)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A multi-branched annual, about 4 dm tall. Flower heads have white ray flowers (drying blue) surrounding whitish, hardened disk flowers. Blooms in summer.
Duration: ANNUAL
Palustrine Habitat(s): FORESTED WETLAND, Riparian, SCRUB-SHRUB WETLAND
Terrestrial Habitat(s): Forest/Woodland, Woodland - Mixed
Habitat Comments: Terraces in moist, sandy canyon bottoms associated with perennial streams.
One site, low terrace, bare soil with annual grasses, herbs, walnut, alder, little overstory. Another site, higher terrace, canyon walls, walnut, juniper. Southwest riparian plant community (Arizona Game and Fish Department 2001).

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: 20Sep1996
NatureServe Conservation Status Factors Author: Maybury, K. and S. Schwartz, rev. A. Olivero (2003), rev. S. Schuetze (2011)
Element Ecology & Life History Author(s): rev. S. Schuetze (2011-07-29).

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
  • Arizona Game and Fish Department. 2001. Erigeron piscaticus. Unpublished abstract compiled and edited by the Heritage Data Management System, Arizona Game and Fish Department, Phoenix, Arizona. 4 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.

  • Nesom, G.L. 1989. A new species of Erigeron (Asteraceae: Astereae) from Arizona. Phytologia 67(4): 304-306.

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