CPC Plant Profile: Barneby's Pepper-grass
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Plant Profile

Barneby's Pepper-grass (Lepidium barnebyanum)

View of the herbaceous perennial. Note the cushion shape growing habit. Photo Credit: Carol Dawson
Description
  • Global Rank: G1 - Critically Imperiled
  • Legal Status: Federally Endangered
  • Family: Brassicaceae
  • State: UT
  • Nature Serve ID: 142407
  • Date Inducted in National Collection: 04/04/1991

Lepidium barnebyanum is a perennial, herbaceous plant in the mustard family. This plant produces glabrous stems and narrow leaves clustered at the base of the plant. Cream-colored flowers begin blooming in April or early May (USFWS 1990). Barneby Ridge-cress has been listed as Endangered since September of 1990. The remaining population totals less than 5000 individuals spread over one 500 acre site (USFWS 1992). The narrow range of this species makes it particularly vulnerable to random environmental events and human threats.

Participating Institutions
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Updates
  • 09/18/2020
  • Orthodox Seed Banking

The Denver Botanic Gardens has several thousand seeds in short and long-term storage as part of the Center for Plant Conservation's national collection of endangered plants.

  • 09/18/2020
  • Seed Collection

The Denver Botanic Gardens has several thousand seeds in short and long-term storage as part of the Center for Plant Conservation's national collection of endangered plants.

Nature Serve Biotics
  • 05/02/2017

An estimated 5000 individuals, occupying a habitat of less than 200 ha, are known. These are located on 4 ridgelines in Duchesne County, Utah. The plants are entirely restricted to white shale outcrops which are being damaged by motorcycles and other off-road vehicle traffic. The habitat is also subject to oil and gas exploration and development.

Thomas Grant
  • 01/01/2010

Threats include off-road vehicles, habitat degradation, possible development of oil and gas wells, stochastic events (USFWS 1992).

Thomas Grant
  • 01/01/2010

Known from 1 population with ca. 5,000 individuals, located on 4 ridgelines in Duchesne County, Utah. (USFWS 1992)

Thomas Grant
  • 01/01/2010

None known.

Thomas Grant
  • 01/01/2010

The Denver Botanic Gardens has several thousand seeds in short and long-term storage as part of the Center for Plant Conservation's national collection of endangered plants.

Thomas Grant
  • 01/01/2010

Management needs include completion of formal management designations for each of the three populations to assure their continued long-term protection from off-road vehicle damage. Research needs include understanding the general reproductive biology and ecology of this species as well as habitat requirements and population dynamics (USFWS 1992).

Thomas Grant
  • 01/01/2010

Additional seed collection and banking.

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Photos
Nomenclature
Taxon Lepidium barnebyanum
Authority Reveal
Family Brassicaceae
CPC Number 2474
ITIS 22957
USDA LEBA
Common Names Barneby pepper grass | Barneby ridge-cress | peppercress | Barneby's pepperweed
Associated Scientific Names Lepidium barnebyanum | Lepidium montanum ssp. demissum
Distribution L. barnebyanum is endemic to Indian Canyon Drainage, Duchesne County, Utah. (USFWS 1992)
State Rank
State State Rank
Utah S1
Habitat

L. barnebyanum is restricted to white marly shale outcrops of the Uinta formation which are often underlain by petroleum deposits. Surrounded by Pinyon-juniper communities on poorly developed soils. Found at elevations of 6,200-6,500 ft. (USFWS 1992).Found with Pinus edulis, Juniperus osteosperma, Arenaria hookeri, Phlox hoodii, Chamaechaenactis scaposa, Parthenium ligulatum, Haplopappus armerioid, Hymenoxys acaulis, Eriogonum batemanii, Townsendia mensana. (USFWS 1990, 1992).

Ecological Relationships

None known.

Pollinators
Common Name Name in Text Association Type Source InteractionID
Reintroduction
Lead Institution State Reintroduction Type Year of First Outplanting

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