Species Profile
Environmental Conservation Online System

Slickspot peppergrass (Lepidium papilliferum)

Kingdom: Plantae
Class: Magnoliopsida
Order: Brassicales
Family: Brassicaceae

Listing Status:   

Announcements

2013-04-16 -- Status changed due to court opinion. See Otter v. Salazar, No. 1:11-cv-00358-CWD, 2012 U.S. Dist. LEXIS 111743.

General Information

Slickspot peppergrass is a tap-rooted, intricately-branched plant. The plant flowers once and then dies (it is monocarpic), and displays two different life cycles, an annual and a biennial form. The plant averages 2 to 8 inches, but can reach up to 16 inches in height. Leaves and stems are covered with fine, soft hairs, and the leaves are divided into linear segments. Flowers are numerous, 0.1 inches diameter, white, and 4-petalled. Fruits (siliques) are 0.1 inches, round in outline, flattened, and 2-seeded. The annual form of the Slickspot peppergrass matures, reproduces by setting seed, and dies in one growing season. The biennial life form initiates growth in the first year as a rosette, but does not produce seed and die until the second year. Biennial rosettes must survive dry summers on the Idaho Snake River Plain and Owyhee Plateau, and consequently many of these rosettes die before flowering and producing seed. The proportion of annuals versus biennials in a population can vary greatly.

Map of Species occurrence

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Map Image Map of Species occurrence Map of Species occurrence

This map represents our best available information about where a species is currently known to or or is believed to occur; however, it should NOT be used as an official species list for Section 7 Consultation purposes. To obtain an official species list for this purpose, please visit the Information, Planning, and Conservation (IPaC) System (click here: http://ecos.fws.gov/ipac)



  • States/US Territories in which the Slickspot peppergrass, is known to or is believed to occur:  Idaho
  • US Counties in which the Slickspot peppergrass, is known to or is believed to occur:  View All
Current Listing Status Summary
Status Date Listed Lead Region Where Listed
10/08/2009 Pacific Region (Region 1)

» Candidate Information

Former Candidate Status

Listing Priority: 
Magnitude: 
Immediacy: 
Taxonomy: 
Species Assessment: 
Candidate Notice of Review Documents (Showing 3 of 3)
Date Citation Page Title
06/13/2002 67 FR 40657 40679 Endangered and Threatened Wildlife and Plants; Review of Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Recycled Petitions; Annual Description of Progress on Listing Actions
10/30/2001 66 FR 54808 54832 ETWP; Review of Plant and Animal Species That Are Candidates or Proposed for Listing as Endangered or Threatened,Annual Notice of Findings on Recycled Petitions, and Annual Description of Progress on Listing Actions; Proposed Rule
10/25/1999 64 FR 57535 57547 Review of Plant and Animal Taxa That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Recycled Petitions; Annual Description of Progress on Listing Actions

» Federal Register Documents

Most Recent Federal Register Documents (Showing 5 of 13: view all)
Date Citation Page Title
10/26/2011 76 FR 66250 66255 Designation of Critical Habitat for Lepidium papilliferum (Slickspot Peppergrass: Proposed rule; reopening of comment period.
07/07/2011 76 FR 39807 39808 Designation of Critical Habitat for Lepidium papilliferum (Slickspot Peppergrass): Proposed rule; extension of comment period.
05/10/2011 76 FR 27184 27215 Designation of Critical Habitat for Lepidium papilliferum (Slickspot Peppergrass); Proposed Rule
10/08/2009 74 FR 52014 52064 Listing Lepidium papilliferum (Slickspot Peppergrass) as a Threatened Species Throughout Its Range; Final Rule
09/19/2008 73 FR 54345 54346 Listing the Plant Lepidium papilliferum (Slickspot Peppergrass) as Endangered

» Conservation Plans

Candidate Conservation Agreements (CCA): (learn more) (Showing 3 of 3)
CCA Plan Summaries
3 Hulls Gulch Reserve Plants (ID): Aase's onion, Mulford's milk-vetch, Slick-spot peppergrass
Boise Airport Slick Spot Peppergrass CCA
Slick Spot Peppergrass

» Petitions

No petition findings have been published for the Slickspot peppergrass, .

» Life History

No Life History information has been entered into this system for this species.

» Other Resources

NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

Last updated: June 19, 2013