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Lomatium pastorale

Darrach & D.H. Wagner

Meadow Lomatium

G2Imperiled Found in 3 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
Very high - highThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.139704
Element CodePDAPI1B270
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderApiales
FamilyApiaceae
GenusLomatium
Synonyms
Lomatium pastoralisD.H. Wagner ex M.E. Darrach & D.H. Wagner
Concept Reference
Darrach, M.E., and D.H. Wagner. 2011. Lomatium pastoralis (Apiaceae), a new narrow endemic species from northeast Oregon. J. Bot. Res. Inst. Texas 5(2): 427 - 435.
Taxonomic Comments
Darrach and Wagner (2011) use the epithet spelling 'pastoralis' but this is corrected to Lomatium pastorale in agreement with the International Code of Nomenclature (2012) Article 23.5; since Lomatium is neuter, 'pastoralis' must be corrected to 'pastorale' (ITIS 2016).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-08-01
Change Date2024-08-01
Edition Date2024-06-07
Edition AuthorsJohnson, J. (2024)
Threat ImpactVery high - high
Range Extent250-1000 square km (about 100-400 square miles)
Number of Occurrences6 - 20
Rank Reasons
Lomatium pastorale is a perennial herb that is found in Grant, Umatilla, Union, and Wallows counties, Oregon, USA. It grows on shallow soils over basalt bedrock. This species is threatened by off-road vehicle use, invasive plant species, fire suppression, and climate change.
Range Extent Comments
Lomatium pastorale is endemic to a small area of northeastern Oregon on the Umatilla National Forest. Observations and collections located south of the city of La Grande are considered to be Lomatium tarantuloides by the Oregon Biodiversity Information Center. Range extent was estimated using herbarium specimens and NatureServe Network occurrence data collected between 1993 and 2024 (SEINet 2024, OSU 2024, CPNWH 2024, NatureServe 2024).
Occurrences Comments
By applying a 1 km separation distance to herbarium specimens and NatureServe Network occurrence data documented between 1993 and 2024, it is estimated that there are 10-11 occurrences range-wide (SEINet 2024, OSU 2024, CPNWH 2024, NatureServe 2024).
Threat Impact Comments
Many occurrences are crossed by off-road vehicle tracks. The invasive species Thinopyrum intermedium, Hypericum perforatum, and Bromus intermis are found in some occurrences. Fire may be an important factor in maintaining the habitat and reducing competition so fire suppression may be causing a population decline at some occurrences. Climate change may be reducing snowpack, causing changes in water availability in the springs and rodent activity during the winter (NatureServe 2024). Many locations were subjected to intense grazing in the past, which may have been beneficial by removing competing vegetation (Wagner 2013).
Ecology & Habitat

Habitat

Lomatium pastorale grows on disturbed, flat to gently sloping, open, rocky or gravelly sites that are moist or saturated in spring but dry later, scablands, forests, shallow, poorly developed soils derived from loess or weathered basalt (WSH 2024).
Terrestrial Habitats
Forest EdgeWoodland - ConiferShrubland/chaparralBarrens
Other Nations (1)
United StatesN2
ProvinceRankNative
OregonS2Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquaculturePervasive (71-100%)Neutral or Potential BenefitHigh (continuing)
2.3 - Livestock farming & ranchingPervasive (71-100%)Neutral or Potential BenefitHigh (continuing)
6 - Human intrusions & disturbanceLarge (31-70%)Serious - moderateHigh (continuing)
6.1 - Recreational activitiesLarge (31-70%)Serious - moderateHigh (continuing)
7 - Natural system modificationsPervasive (71-100%)Serious - moderateHigh (continuing)
7.1 - Fire & fire suppressionPervasive (71-100%)Serious - moderateHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesRestricted (11-30%)Serious - moderateHigh (continuing)
8.1 - Invasive non-native/alien species/diseasesRestricted (11-30%)Serious - moderateHigh (continuing)
11 - Climate change & severe weatherPervasive (71-100%)Serious - moderateModerate (short-term)
11.1 - Habitat shifting & alterationPervasive (71-100%)Serious - moderateModerate (short-term)

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Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)Yes
Roadless Areas (3)
Oregon (3)
AreaForestAcres
HellholeWallowa-Whitman National Forest487
Mt. EmilyWallowa-Whitman National Forest8,421
North Mt. EmilyUmatilla National Forest4,416
References (11)
  1. Consortium of Pacific Northwest Herbaria (CPNWH). 2024. Online database of vascular plant specimens from the Pacific Northwest. Online. Available: http://www.pnwherbaria.org/index.php (accessed 2024).
  2. Darrach, M.E., and D.H. Wagner. 2011. <i>Lomatium pastoralis</i> (Apiaceae), a new narrow endemic species from northeast Oregon. J. Bot. Res. Inst. Texas 5(2): 427 - 435.
  3. 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.
  4. Integrated Taxonomic Information System (ITIS). 2016. Integrated Taxonomic Information System: Biological Names. Online. Available: http://www.itis.gov.
  5. International Plant Names Index (IPNI). 2016. Online. Available: http://www.ipni.org. (Accessed 2016).
  6. Lomatium & Friends Online Monographs. 2024. Wisconsin State Herbarium, UW-Madison. https://symbiota2.math.wisc.edu/pena/portal/index.php
  7. McNeill, J., F.R. Barrie, W.R. Buck, V. Demoulin, W. Greuter, D.L. Hawksworth, P.S. Herendeen, S. Knapp, K. Marhold, J. Prado, W.F. Prud'homme Van Reine, G.F. Smith, J.H. Wiersema. 2011. International Code of Nomenclature for algae, fungi, and plants (Melbourne Code). Regnum Vegetabile 154. Koeltz Scientific Books.
  8. NatureServe. 2024. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  9. Oregon State University (OSU). 2024. Oregon Flora website. Oregon State University Herbarium at Oregon State University. Online. Available: https://oregonflora.org/ (accessed 2024).
  10. Southwest Environmental Information Network (SEINet). 2024. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2024).
  11. Wagner, D. H. 2013. The Discovery of Shepherd’s Desert Parsley (Lomatium pastorale), an Oregon Endemic. Kalmiopsis, Volume 20. https://www.npsoregon.org/kalmiopsis/kalmiopsis20/kalm20wagner.pdf