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Lomatium rollinsii

Mathias & Constance

Rollins' Lomatium

G3Vulnerable Found in 2 roadless areas NatureServe Explorer →
G3VulnerableGlobal Rank
Medium - lowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.133725
Element CodePDAPI1B1P0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderApiales
FamilyApiaceae
GenusLomatium
Other Common Names
Rollins' Biscuitroot (EN) Rollins' biscuitroot (EN)
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 Date2022-12-28
Change Date1991-02-08
Edition Date2022-12-28
Edition AuthorsGamon, John G. WANHP botanist (1992), rev. C. Nordman (2022).
Threat ImpactMedium - low
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Rollins' Lomatium occurs in the northwestern United States, only in the Snake River Canyon, Salmon River Canyon and tributary canyons in southeastern Washington, northeastern Oregon, and western Idaho. The total population size is unknown, but there are about 50 occurrences with a range extent of about 10,000 square kilometers. There are occurrences in the Hells Canyon National Recreation Area, including within the Hells Canyon Wilderness Area, and on other conservation lands. Over grazing and invasive exotic plants represent potentially significant threats.
Range Extent Comments
Rollins' Lomatium occurs in the northwestern United States, in the vicinity of the Snake River Canyon and Salmon River Canyon in Asotin County, in southeastern Washington, in Baker and Wallowa counties, in northeastern Oregon and Nez Perce, Lewis, and Idaho counties, in western Idaho. The range extent is estimated to be 10,580 square kilometers (NatureServe 2022, SEINet 2022).
Occurrences Comments
About 50 occurrences are known, since it occurs in difficult to access areas, there may be additional, undiscovered occurrences (iNaturalist 2022, Moseley 1988, NatureServe 2022, SEINet 2022).
Threat Impact Comments
Conversion of habitat to agricultural use and heavy livestock grazing are the greatest threats. Invasive exotic plants are also a threat, including Hypericum perforatum, Bromus tectorum, Anthriscus caucalis, and especially Centaurea solstitialis (NatureServe 2022, WNHP 2022). When many locations of Rollins' Lomatium were documented in the late 1980s, no plants were found on sites that were being heavily grazed (Moseley 1988).
Ecology & Habitat

Diagnostic Characteristics

There are ten taxa of Lomatium in the Snake River Canyon area, three of these, including L. rollinsii are in the tuberous lomatium group. The use of keys to the taxa of Lomatium is recommended (Meyers et al. 2020, Moseley 1988).

Habitat

Rollins' Lomatium occurs in the Snake River Canyon and lower Salmon River Canyon and tributary canyons, in mid to low elevation canyon grasslands of early to late seral successional stage. It is found on gentle to very steep slopes, on soils which are loamy, gravelly or rocky. It occurs at 244 - 1305 meters (800 - 4280 feet) in elevation. (Moseley 1988, SEINet 2022, WNHP 2022).

Reproduction

Lomatium rollinsii flowers from early April to early May, fruits mature quickly, and at lower elevations, shatter by mid-May, which makes identification difficult (Moseley 1988).
Terrestrial Habitats
Grassland/herbaceous
Other Nations (1)
United StatesN3
ProvinceRankNative
OregonS3Yes
IdahoS3Yes
WashingtonS2Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquacultureRestricted - smallSerious or 31-70% pop. declineHigh (continuing)
2.1 - Annual & perennial non-timber cropsRestricted - smallSerious or 31-70% pop. declineHigh (continuing)
2.3 - Livestock farming & ranchingRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
8.1 - Invasive non-native/alien species/diseasesRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)

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Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)Yes
Roadless Areas (2)
Washington (2)
AreaForestAcres
Asotin CreekUmatilla National Forest16,433
Wenatchee CreekUmatilla National Forest15,315
References (9)
  1. 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.
  2. iNaturalist. 2022. Online. Available: https://www.inaturalist.org (accessed 2022).
  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. Meyers, S.C., T. Jaster, K.E. Mitchell, T. Harvey, and L.K. Hardison, editors. 2020. Flora of Oregon. Volume 2: Dicots A-F. Botanical Research Institute of Texas, Fort Worth, TX. 861 pp.
  5. Moseley, R.K. 1988. Species management guide for <i>Lomatium rollinsii</i>. Idaho Department of Fish and Game, Conservation Data Center, Boise. 9 pp. plus appendices. Online. Available: https://idfg.idaho.gov/ifwis/idnhp/cdc_pdf/moser88c.pdf (Accessed 2022).
  6. NatureServe. 2022. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  7. Schlessman, M. A. 1984. Systematics of tuberous LOMATIUMS (UMBELLIFERAE). Syst. Bot Mono. 4:1-55.
  8. Southwest Environmental Information Network (SEINet). 2022. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2022).
  9. Washington Natural Heritage Program (WNHP). 2022. Online Field Guide to the Rare Plants of Washington Online. Available: https://fieldguide.mt.gov/wa (accessed 2022).