Roadless Areas
Home/Species/ Gairdner's Yampah

Perideridia gairdneri

(Hook. & Arn.) Mathias

Gairdner's Yampah

G3Vulnerable (G3G4) Found in 29 roadless areas NatureServe Explorer →
G3VulnerableGlobal Rank
High - mediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.131336
Element CodePDAPI1N062
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderApiales
FamilyApiaceae
GenusPerideridia
Synonyms
Perideridia gairdneri ssp. gairdneri
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.
Taxonomic Comments
This record represents the narrow concept of Perideridia gairdneri following FNA (vol. 13, 2024) which is equivalent to P. gairdneri ssp. gairdneri of Kartesz (1994) and does not include P. montana (=P. gairdneri ssp. borealis). In contrast, Kartesz (1994) recognized P. gairdneri in a broad sense with two subspecies: P. gairdneri ssp. borealis and P. gairdneri ssp. gairdneri.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2018-09-28
Change Date2018-09-28
Edition Date2018-09-28
Edition AuthorsD. Gries, rev. R. Bittman (2014, 2018)
Threat ImpactHigh - medium
Range Extent20,000-200,000 square km (about 8000-80,000 square miles)
Number of Occurrences81 - 300
Rank Reasons
Endemic to California (USA), Perideridia gairdneri is a perennial herb that is at risk in the southern portion of its range but can be common locally in the northern counties of California.Threats include agriculture and urbanization.
Range Extent Comments
Perideridia gairdneri occurs throughout coastal or near coastal California, U.S.A.. Range extent excludes data from western portions of California.
Occurrences Comments
Based on a 1 km separation distance applied to herbarium records documented between 1993 and 2024, there are at least 90 occurrences (GBIF 2024). This species may be relatively common in northern California, but in decline or extirpated in the southern portion of the state.
Threat Impact Comments
Threats include urbanization, agriculture, weeds, and grazing (CNDDB 2018).
Ecology & Habitat

Habitat

This species grows on coastal flats, in grasslands, and pine forests (Jepson Flora Project 2024).
Terrestrial Habitats
Forest/WoodlandForest - ConiferGrassland/herbaceous
Other Nations (1)
United StatesN3
ProvinceRankNative
OregonSNRYes
CaliforniaS3Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial developmentRestricted (11-30%)Extreme or 71-100% pop. declineHigh (continuing)
1.1 - Housing & urban areasRestricted (11-30%)Extreme or 71-100% pop. declineHigh (continuing)
1.2 - Commercial & industrial areasRestricted (11-30%)Extreme or 71-100% pop. declineHigh (continuing)
2 - Agriculture & aquacultureRestricted (11-30%)Extreme - moderateHigh (continuing)
2.3 - Livestock farming & ranchingRestricted (11-30%)Extreme - moderateHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesLarge - restrictedModerate or 11-30% pop. declineHigh (continuing)
8.1 - Invasive non-native/alien species/diseasesLarge - restrictedModerate or 11-30% pop. declineHigh (continuing)

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (29)
California (4)
AreaForestAcres
Dinkey LakesSierra National Forest34,171
EagleStanislaus National Forest16,116
Hoover - NorthHumboldt-Toiyabe National Forest1,574
Iceberg - Mill CreekHumboldt-Toiyabe National Forest26,988
Idaho (1)
AreaForestAcres
West Meadow CreekNez Perce-Clearwater National Forest115,949
Montana (5)
AreaForestAcres
Big Snowy Mountains WsaLewis and Clark National Forest88,003
BridgerGallatin National Forest45,059
Scotchman Peaks (MT)Kootenai National Forest53,909
Tenderfoot - Deep CreekLewis and Clark National Forest85,614
West PioneerBeaverhead-Deerlodge National Forest248,631
Nevada (1)
AreaForestAcres
Ruby - Lamoille CynHumboldt-Toiyabe National Forest32,771
Oregon (3)
AreaForestAcres
Little SheepWallowa-Whitman National Forest5,238
Lookout MountainOchoco National Forest14,115
North KalmiopsisSiskiyou National Forests91,560
Utah (4)
AreaForestAcres
418012Uinta National Forest25,758
418013Uinta National Forest14,643
Right Hand Fork LoganWasatch-Cache National Forest15,023
Temple PeakWasatch-Cache National Forest24,081
Washington (3)
AreaForestAcres
Norse PeakWenatchee National Forest10,169
QuartzWenatchee National Forest8,550
TaneumWenatchee National Forest26,140
Wyoming (8)
AreaForestAcres
Battle CreekMedicine Bow-Routt National Forest5,890
Big SandstoneMedicine Bow-Routt National Forest7,180
Grayback RidgeBridger-Teton National Forest295,113
Laramie PeakMedicine Bow-Routt National Forest28,608
Little BighornBighorn National Forest133,949
Sibley LakeBighorn National Forest10,367
Spread Creek - Gros Ventre RiverBridger-Teton National Forest166,097
Walker PrairieBighorn National Forest62,434
References (4)
  1. California Natural Diversity Database (CNDDB). 2014. RareFind Version 5. California Department of Fish and Game, Sacramento.
  2. Flora of North America Editorial Committee (FNA). 2024. Flora of North America north of Mexico. Vol. 13. Magnoliophyta: Geraniaceae to Apiaceae. Oxford Univ. Press, New York. xxiv + 566 pp.
  3. 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.
  4. Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.