Slickspot peppergrass (Lepidium papilliferum)

Candidate Info | Federal Register | Conservation Plans | Petitions | Life History

Listing Status:   

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.

  • States/US Territories in which the Slickspot peppergrass, Wherever found is known to or is believed to occur:  Idaho
  • US Counties in which the Slickspot peppergrass, Wherever found is known to or is believed to occur:  View All
 
Current Listing Status Summary
Status Date Listed Lead Region Where Listed
09/16/2016 Pacific Region (Region 1) Wherever found

» Candidate Information

Candidate Notice of Review Documents
Date Citation Page Title
06/13/2002 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
10/25/1999 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
10/30/2001 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

» Federal Register Documents

Federal Register Documents
Date Citation Page Title
02/12/2014 79 FR 8416 8428 Threatened Status for Lepidium papilliferum (Slickspot Peppergrass) Throughout Its Range
01/22/2004 69 FR 3094 3116 Withdrawal of Proposed Rule To List Lepidium papilliferum (Slickspot Peppergrass) as Endangered
02/12/2014 79 FR 8402 8413 Designation of Critical Habitat for Lepidium papilliferum
07/18/2003 68 FR 42666 42668 Endangered and Threatened Wildlife and Plants; Listing the Plant Lepidium papilliferum (Slickspot Peppergrass): Proposed rule; 6-month extension of the deadline for final determination and reopening of comment period.
05/10/2011 76 FR 27184 27215 Designation of Critical Habitat for Lepidium papilliferum (Slickspot Peppergrass); Proposed Rule
10/26/2011 76 FR 66250 66255 Designation of Critical Habitat for Lepidium papilliferum (Slickspot Peppergrass: Proposed rule; reopening of comment period.
09/19/2008 73 FR 54345 54346 Listing the Plant Lepidium papilliferum (Slickspot Peppergrass) as Endangered
10/08/2009 74 FR 52014 52064 Listing Lepidium papilliferum (Slickspot Peppergrass) as a Threatened Species Throughout Its Range; Final Rule
07/07/2011 76 FR 39807 39808 Designation of Critical Habitat for Lepidium papilliferum (Slickspot Peppergrass): Proposed rule; extension of comment period.
08/17/2016 81 FR 55057 55084 Threatened Status for Lepidium papilliferum (Slickspot Peppergrass) Throughout Its Range; Final Rule
04/21/2014 79 FR 22077 22079 Designation of Critical Habitat for Lepidium Papilliferum
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
09/25/2002 67 FR 60206 60207 Reopening of the Comment Period for the Proposed Rule to List the Plant Lepidium papilliferum (slickspot peppergrass) as Endangered
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
04/21/2014 79 FR 22076 22077 Threatened Status for Lepidium Papilliferum (Slickspot Peppergrass) Throughout Its Range
01/12/2007 72 FR 1622 1644 Withdrawal of Proposed Rule To List Lepidium papilliferum (Slickspot Peppergrass) Proposed rule; withdrawal.
07/15/2002 67 FR 46441 46450 Endangered and Threatened Wildlife and Plants; Listing the Plant Lepidium papilliferum (slickspot peppergrass) as Endangered

» Conservation Plans

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

» Petitions

» 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.

FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.