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Chaenactis parishii

A. Gray

Parish's Chaenactis

G3Vulnerable Found in 1 roadless area NatureServe Explorer →
G3VulnerableGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.133533
Element CodePDAST200D0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusChaenactis
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.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2025-02-24
Change Date2003-07-02
Edition Date2025-02-24
Edition AuthorsOliver, L. (2002), rev. Soteropoulos (2025)
Threat ImpactUnknown
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Chaenactis parishii is a subshrub in openings of low montane chaparral and woodlands in rocky to sandy soils that is narrowly endemic in southwestern North America from the higher Peninsular Ranges in southern California, United States and adjacent northern Baja California, Mexico in the northern Sierra Juarez to the northern Sierra San Pedro Martir. There are an estimated 37 occurrences which face threats from development, grazing, road maintenance, trail construction and recreational activities, and invasive species. Monitoring of populations should be conducted to improve our understanding of reproduction, plant abundance, threats, and trends, as well as continuing conservation measures to protect the taxon.
Range Extent Comments
Chaenactis parishii occurs in southwestern North America from the higher Peninsular Ranges of Riverside and San Diego counties in southern California, United States and adjacent northern Baja California, Mexico in the northern Sierra Juarez to the northern Sierra San Pedro Martir (Wiggins 1980, CNPS 2001, FNA 2006, Jepson 2025). Range extent was estimated to be 7,759 square kilometers using herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1984 and 2025 (RARECAT 2024, GBIF 2025, iNaturalist 2025, NatureServe 2025, SEINet 2025).
Occurrences Comments
By applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1984 and 2025, it is estimated that there are 37 occurrences rangewide (RARECAT 2024, GBIF 2025, iNaturalist 2025, NatureServe 2025, SEINet 2025).
Threat Impact Comments
Although threats are not widely documented, this species is threatened by development, grazing, road maintenance, trail construction and recreational activities, invasive species, and other threats in some places, though there is insufficient data, including anecdotal accounts, to understand scope and severity of threats for this species (CNDDB 2025).
Ecology & Habitat

Habitat

Chaenactis parishii grows in openings of low montane chaparral and woodlands in rocky to sandy soils at elevations ranging from 1,300 to 2,500 meters (FNA 2006, Jepson 2025).
Terrestrial Habitats
Forest/WoodlandShrubland/chaparral
Other Nations (1)
United StatesN3
ProvinceRankNative
CaliforniaS3Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial developmentUnknownSerious or 31-70% pop. declineHigh (continuing)
2 - Agriculture & aquacultureUnknownSerious - moderateHigh (continuing)
2.3 - Livestock farming & ranchingUnknownSerious - moderateHigh (continuing)
4 - Transportation & service corridorsUnknownSerious - slightHigh (continuing)
4.1 - Roads & railroadsUnknownSerious - slightHigh (continuing)
6 - Human intrusions & disturbanceUnknownModerate or 11-30% pop. declineHigh (continuing)
6.1 - Recreational activitiesUnknownModerate or 11-30% pop. declineHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesUnknownModerate - slightHigh (continuing)
8.1 - Invasive non-native/alien species/diseasesUnknownModerate - slightHigh (continuing)
8.1.1 - Unspecified speciesUnknownModerate - slightHigh (continuing)

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Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (1)
California (1)
AreaForestAcres
Cactus Springs BSan Bernardino National Forest3,106
References (11)
  1. California Native Plant Society (CNPS). 2001. Inventory of Rare and Endangered Plants of California (sixth edition). Rare Plant Scientific Advisory Committee, David P. Tibor, Convening Editor. California Native Plant Society. Sacramento, CA. x + 388pp.
  2. California Natural Diversity Database (CNDDB). 2025. RareFind Version 5.3.0. California Department of Fish and Game, Sacramento.
  3. Flora of North America Editorial Committee (FNA). 2006c. Flora of North America north of Mexico. Vol. 21. Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford Univ. Press, New York. xxii + 616 pp.
  4. Global Biodiversity Information Facility (GBIF). 2025. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2025).
  5. iNaturalist. 2025. Online. Available: https://www.inaturalist.org (accessed 2025).
  6. Jepson Flora Project (eds.) 2025. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (accessed 2025).
  7. 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.
  8. NatureServe. 2025. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  9. NatureServe's Rapid Analysis of Rarity and Endangerment Conservation Assessment Tool (RARECAT). 2024. Version: 1.1.1 (released Oct 01, 2024).
  10. Southwest Environmental Information Network (SEINet). 2025. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2025).
  11. Wiggins, I.L. 1980. Flora of Baja California. Stanford Univ. Press, Stanford, California. 1025 pp.