CPC Plant Profile: Fremont County Rockcress
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Plant Profile

Fremont County Rockcress (Boechera pusilla)

Description
  • Global Rank: G1 - Critically Imperiled
  • Legal Status: N/A
  • Family: Brassicaceae
  • State: CA, WY
  • Nature Serve ID: 159356
  • Date Inducted in National Collection:

A perennial herb with 2-several prostrate or gently arching stems up to 17 cm long, spreading outward from a basal rosette of leaves. Leaves have a sparse covering of soft-spreading hairs. Tiny, 4-petaled lavender flowers bloom in May and June, followed by narrow, smooth fruits that hang down at right angles to the stems.

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Updates
Nature Serve Biotics
  • 05/02/2017

Known from a single locality in westcentral Wyoming. Probably a neoendemic; intrinsically rare. Potentially threatened by gold mining activity.

Rollins, Mary VB Goshorn
  • 01/01/2010

Grazing and motorized recreation impact are precluded by exclosure, provided that the exclosure is maintained. It has been withdrawn from mineral entry, precluding potential threats by gold mining activity.

Rollins, Mary VB Goshorn
  • 01/01/2010

One known site.

Rollins, Mary VB Goshorn
  • 01/01/2010

Unknown

Rollins, Mary VB Goshorn
  • 01/01/2010

Unknown

Rollins, Mary VB Goshorn
  • 01/01/2010

Unknown

Rollins, Mary VB Goshorn
  • 01/01/2010

Unknown

MORE

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Photos
Nomenclature
Taxon Boechera pusilla
Authority Rollins
Family Brassicaceae
CPC Number 192
ITIS 823137
USDA ARPU18
Common Names Fremont County Rockcress
Associated Scientific Names Boechera pusilla | Arabis pusilla
Distribution Known from a single locality in westcentral Wyoming. Probably a neoendemic; intrinsically rare. State endemic restricted to the southern Wind River Range (South Pass area) in Fremont County, Wyoming
State Rank
State State Rank
California testrank-2
Wyoming S1
Habitat

Coarse soil that has accumulated in cracks and crevices of sparsely vegetated granite-pegmatite outcrops at about 2350 m elevation. The surrounding plant community is sagebrush grassland.

Ecological Relationships

Very narrow. Specialist or community with key requirements scarce.

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

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