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Lomatium latilobum

(Rydb.) Mathias

Canyonlands Lomatium

G2Imperiled Found in 1 roadless area NatureServe Explorer →
G2ImperiledGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.153286
Element CodePDAPI1B100
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderApiales
FamilyApiaceae
GenusLomatium
Synonyms
Aletes latilobus(Rydb.) Weber
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 Date2023-05-08
Change Date2022-07-14
Edition Date2023-05-08
Edition AuthorsS. Spackman (1994); B. Franklin (1995); L. Morse and M.J. Lyon (1996), rev. Franklin (1996), rev. Handwerk, J. (2006), rev. A. Tomaino (2011), rev. Treher (2022), rev. J. Handwerk and A. Tomaino (2023)
Threat ImpactUnknown
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Lomatium latilobum is a perennial herb that occurs in the western United States where it is restricted to the Colorado Plateau and Navajo Basin in Grand and San Juan Counties in Utah and Mesa County, Colorado. There are approximately 21 extant occurrences. The greatest threats to this species are direct damage to or mortality of plants by hikers, rock climbers, and mountain bikes and competition with invasive plant species. Population size and trends are not known.
Range Extent Comments
Lomatium latilobum occurs in the western United States where it is restricted to the Colorado Plateau and Navajo Basin in Grand and San Juan Counties in Utah and Mesa County, Colorado. Range extent calculations include data from multiple dataset (NatureServe 2022, SEINet 2022, Utah Rare Plant Database 2020).
Occurrences Comments
There are approximately 19 occurrences in Utah (McCormick and Wheeler, pers .com., 2020). There are 6 occurrences documented in the Colorado Natural Heritage Program database (as of 2023).
Threat Impact Comments
The most significant threat to this species may be recreational activities include hiking, biking, and rock climbing which causes disturbance to the plants (damage or mortality) and its habitat. Some occurrences may be so remote that they are protected from threats like recreation (McCormick and Wheeler, pers. comm., 2020, CNPS 2013). Non-native plants present are present at some sites and include Bromus tectorum and Lepidium perfoliatum (NatureServe 2022). Livestock grazing and mining activities may threaten the species on lands outside of National Park boundaries (McCormick and Wheeler, pers. comm., 2020, CNPS 2013). This species is considered to be extremely vulnerable to climate change (Handwerk et al. 2015).
Ecology & Habitat

Description

Perennial plants over 10 cm tall. Plants form broad mats with numerous short caudices. Plants are acaulescent; leaves are all basal. Leaves are once pinnately compound with lanceolate leaflets 5-40 mm long and over 5 mm wide. Flowers are yellow. Involucel bractlets are conspicuous and longer than the flowers, 5-10 mm in length. Strong lemony or anise scent (Colorado Native Plant Society 1997, Spackman et al. 1997, Ackerfield 2015, Weber and Wittmann 2012).

Habitat

This species grows in sandy soil deposits and in rocky crevices on Entrada Sandstone and Navajo Sandstone or the contact point of the Wingate and Chinle Formations, between fins and in slot canyons. Surrounding plant communities are desert shrub, pinyon-juniper, or ponderosa pine-mountain brush. It grows at elevations of 1,237 to 5,807 meters (CNHP 2013).
Terrestrial Habitats
Shrubland/chaparralDesertBare rock/talus/scree
Other Nations (1)
United StatesN2
ProvinceRankNative
ColoradoS1Yes
UtahS2Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquacultureLarge (31-70%)Slight or 1-10% pop. declineHigh (continuing)
2.3 - Livestock farming & ranchingLarge (31-70%)Slight or 1-10% pop. declineHigh (continuing)
3 - Energy production & miningLarge (31-70%)Slight or 1-10% pop. declineHigh (continuing)
3.2 - Mining & quarryingLarge (31-70%)Slight or 1-10% pop. declineHigh (continuing)
4 - Transportation & service corridorsSmall (1-10%)Slight or 1-10% pop. declineHigh (continuing)
4.1 - Roads & railroadsSmall (1-10%)Slight or 1-10% pop. declineHigh (continuing)
6 - Human intrusions & disturbanceLarge (31-70%)UnknownHigh (continuing)
6.1 - Recreational activitiesLarge (31-70%)UnknownHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesPervasive (71-100%)Slight or 1-10% pop. declineHigh (continuing)
8.1 - Invasive non-native/alien species/diseasesPervasive (71-100%)Slight or 1-10% pop. declineHigh (continuing)
11 - Climate change & severe weatherPervasive (71-100%)UnknownLow (long-term)

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Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)Yes
Roadless Areas (1)
Utah (1)
AreaForestAcres
Horse Mountain - Mans PeakManti-Lasal National Forest22,159
References (16)
  1. Ackerfield, J. 2015. Flora of Colorado. Botanical Research Institute of Texas, Fort Worth, TX. 818 pp.
  2. Colorado Natural Heritage Program (CNHP). 2013. Colorado Rare Plant Guide. Online. Available: www.cnhp.colostate.edu.
  3. Colorado Natural Heritage Program (CNHP). 2022. Biodiversity Tracking and Conservation System (Biotics 5). Colorado Natural Heritage Program, Colorado State University, Fort Collins.
  4. Colorado Natural Heritage Program (CNHP). 2023. Biodiversity Tracking and Conservation System (Biotics 5). Colorado Natural Heritage Program, Colorado State University, Fort Collins.
  5. 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.
  6. Franklin, M.A. 1996. Field survey for Lomatium latilobum (Rydb.) Mathias in the Grand Resource Area, Grand and San Juan counties, Utah. Final report for 1995 Challenge Cost Share Project, Utah Dept. Natural Resources, Utah Natural Heritage Program, and Bureau of Land Management. Unpublished document on file Utah Natural Heritage Program, Salt Lake City. 11pp + appendices.
  7. Handwerk, J., L. Grunau, and S. Spackman-Panjabi. 2015. Colorado Wildlife Action Plan: 2015 Rare Plant Addendum. Colorado Natural Heritage Program, Colorado State University, Fort Collins, Colorado, USA.
  8. Heil, K. D., D. Hyder, R. Melton, and R. Fleming. 1991. The threatened/endangered flora of the San Juan Resource Area. Contract #J910C10022. Pp. 1-36 + appendices.
  9. Heil, K. D., L. Floyd-Hanna, L. Reeves, D. Hyder, and R. Fleming. 1993. Composition, distribution, abundance and habitat requirements of endangered, threatened, and rare plant species in the Southeast Utah Group of National Parks. Prepared for [U.S.] National Park Service [by] San Juan College[,] Farmington, New Mexico. 96 pp.
  10. 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.
  11. McCormick, Meghan. Personal communication. Natural Heritage Botany Intern, USU Department of Wildland Resources, Salt Lake City, UT.
  12. Rondeau, R., K. Decker, J. Handwerk, J. Siemers, L. Grunau, and C. Pague. 2011. The state of Colorado's biodiversity 2011. Prepared for The Nature Conservancy. Colorado Natural Heritage Program, Colorado State University, Fort Collins, Colorado.
  13. Spackman, S., B. Jennings, J. Coles, C. Dawson, M. Minton, A. Kratz, and C. Spurrier. 1997. Colorado rare plant field guide. Prepared for Bureau of Land Management, U.S. Forest Service and U.S. Fish and Wildlife Service by Colorado Natural Heritage Program.
  14. Weber, W.A., and R.C. Wittmann. 2012a. Colorado Flora, Eastern Slope, a field guide to the vascular plants, fourth edition. University of Colorado Press. Boulder, Colorado. 555 pp.
  15. Welsh, S. L. 1978d. Status report: <i>Lomatium latilobum</i>. Unpublished report prepared for the U.S. Fish and Wildlife Service.
  16. Wheeler, Mindy. Rare Plant Conservation Coordinator. State of Utah and USU Wildland Resources.