Home/Species/ Trotter's Oreoxis

Cymopterus trotteri

(S.L. Welsh & Goodrich) Cronquist

Trotter's Oreoxis

G2Imperiled Found in 2 roadless areas NatureServe Explorer →

G2ImperiledGlobal Rank

UnknownThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.148695

Element CodePDAPI1H040

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderApiales

FamilyApiaceae

GenusCymopterus

Synonyms

Oreoxis trotteriWelsh & Goodrich

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 Date2022-07-25

Change Date2022-07-25

Edition Date2022-07-25

Edition AuthorsB. Franklin (1995, 1996), rev. Treher (2022)

Threat ImpactUnknown

Range Extent<100 square km (less than about 40 square miles)

Number of Occurrences1 - 5

Rank Reasons

Oreoxis trotteri is a perennial herb that is a narrow endemic of Utah in the western United States.

Range Extent Comments

Oreoxis trotteri occurs in the western United States where it occurs on the Colorado Plateau in Utah in Emery and Grand County. Range extent was estimated at 95 sq km with data from Utah Rare Plant Database (2020) and SEINet (2020).

Threat Impact Comments

Occurrences are, for the most part, mesa tops, outside of the extensive mountain bike activity around their bases. At one location, however, the occurrence extends to the east base where dune buggy activities may be having some impact.

Ecology & Habitat

Habitat

This species grows in crevices or in sandy pockets on the Moab Tongue and (occasionally) the Slick Rock members of the Entrada Sandstone. It is found in the open, although usually on sites with a northern aspect, and, less frequently, in alcoves and along shaded cliff bases. It grows in mixed juniper and warm desert shrub community at 1,359 to 1,573 m elevation.

Terrestrial Habitats

Forest/WoodlandWoodland - ConiferDesertBare rock/talus/scree

Other Nations (1)

United StatesN2

Province	Rank	Native
Utah	S2	Yes

Threat Assessments

Threat	Scope	Severity	Timing
6 - Human intrusions & disturbance	Negligible (<1%)	Negligible or <1% pop. decline	High (continuing)
6.1 - Recreational activities	Negligible (<1%)	Negligible or <1% pop. decline	High (continuing)
11 - Climate change & severe weather	Pervasive (71-100%)	Unknown	High - low

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)No

Roadless Areas (2)

Utah (2)

Area	Forest	Acres
Box - Death Hollow	Dixie National Forest	3,175
Hog Ranch	Dixie National Forest	17,130

References (6)

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.
Franklin, M.A. 1988. Report for sensitive plant inventory project, Moab District, Bureau of Land Management. Target species: Oreoxis trotteri. The Nature Conservancy/Utah Natural Heritage Program. Unpublished report on file Utah Natural Heritage Program, Salt Lake City. 6 pp + appendices.
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.
Southwest Environmental Information Network (SEINet). 2020. Collections Databases. Online. Available: http://swbiodiversity.org/seinet/collections/index.php (accessed 2020).
Welsh, S.L., and S. Goodrich. 1985. A fourth species of <i>Oreoxis </i>(Umbelliferae). Great Basin Naturalist 45(1):34-36.
Welsh, S.L., N.D. Atwood, S. Goodrich, and L.C. Higgins (eds.) 1993. A Utah flora. 2nd edition. Brigham Young Univ., Provo, Utah. 986 pp.

Cymopterus trotteri

Habitat

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