Taxon Report

Lepidium virginicum L. var. robinsonii (Thell.) Hitchc.

Robinson's pepper-grass

Print Report


© 2015 Keir Morse

  Classification
Scientific Name:
 Lepidium virginicum L. var. robinsonii (Thell.) Hitchc.
Common Name:
 Robinson's pepper-grass
Family: Brassicaceae
Element Code: PDBRA1M114
USDA Plants Symbol: LEVIR
Synonyms/Other Names:

Ecology and Life History
Lifeform: annual herb
Blooming Period: Jan-Jul Jan-Jul
Elevation: 1-885 (5-2905)
General Habitats: Chaparral, Coastal scrub
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 4.3
Global Rank: G5T3
State Rank:
 S3
State List: None
Fed List: None
Other Status:
CRPR Changes:
  • changed from 1B.2 to 4.3 on 2013-06-24

Occurrence Data from the CNDDB
Total Occurrences: 142
Element Occurrence Ranks:
   Excellent (A) 1
   Good (B) 6
   Fair (C) 5
   Poor (D) 1
   None (X) 1
   Unknown (U) 128

Location
California Endemic:  False
California Counties and Islands: Name (Code)
Los Angeles (LAX), Mono (MNO), Orange (ORA), Riverside (RIV), San Bernardino (SBD), San Diego (SDG), Santa Barbara (SBA), Ventura (VEN)
Quads: Name (Quad Code)
Aguanga (3311647), Alberhill (3311764), Alpine (3211677), Azusa (3411728), Bachelor Mtn. (3311751), Barrett Lake (3211666), Beauty Mountain (3311646), Black Star Canyon (3311776), Bucksnort Mtn. (3311645), Butterfly Peak (3311655), Campo (3211654), Corona North (3311785), Corona South (3311775), Del Mar (3211782), Dulzura (3211667), El Cajon (3211678), El Cajon Mtn. (3211687), El Casco (3311781), El Toro (3311766), Encinitas (3311713), Escondido (3311711), Fallbrook (3311743), Fontana (3411714), Glendora (3411727), Hemet (3311668), Imperial Beach (3211751), Jamul Mountains (3211668), La Jolla (3211772), La Mesa (3211771), Lake Elsinore (3311763), Lake Mathews (3311774), Las Pulgas Canyon (3311734), Lompoc (3412064), Los Angeles (3411812), Margarita Peak (3311744), Morena Reservoir (3211665), Morro Hill (3311733), Mount Dana (3711982), Mt. Baldy (3411726), Mt. Wilson (3411821), Murrieta (3311752), National City (3211761), Newbury Park (3411828), Ojai (3411942), Ontario (3411716), Otay Mesa (3211658), Otay Mountain (3211657), Pala (3311731), Pechanga (3311741), Point Loma (3211762), Poway (3211781), Prado Dam (3311786), Rancho Santa Fe (3311712), Redlands (3411712), Riverside East (3311783), Riverside West (3311784), Rodriquez Mtn. (3311628), Romoland (3311762), Sage (3311658), San Bernardino South (3411713), San Clemente (3311745), San Clemente Island North (3211885), San Clemente Island South (3211873), San Dimas (3411717), San Fernando (3411834), San Luis Rey (3311723), San Marcos (3311722), San Nicolas Island (3311924), San Onofre Bluff (3311735), San Pasqual (3311618), San Vicente Reservoir (3211688), Santa Cruz Island A (3311987), Santa Cruz Island B (3311986), Santa Cruz Island C (3311985), Santiago Peak (3311765), Sitton Peak (3311754), Steele Peak (3311773), Sunland (3411833), Sunnymead (3311782), Surf (3412065), Tecate (3211656), Temecula (3311742), Tustin (3311767), Vail Lake (3311648), Valley Center (3311721), Viejas Mountain (3211676), Winchester (3311761), Yorba Linda (3311787), Yucaipa (3411711)

Threat List Data from the CNDDB

Threat List Total: 6
EOs with Threat Listed: Total EOs % of EOs
8 6 %
Non-native plant impacts 3 2%
Road/trail construction/maint. 2 1%
Development 2 1%
Foot traffic/trampling 2 1%
Grazing 1 0%
Wood cutting or brush clearing 1 0%

Notes
Previously CRPR 1B.2; more common than originally known. Threatened by development. Possibly threatened by non-native plants. A synonym of L. virginicum ssp. menziesii in TJM 2. See Mitteilungen aus dem Botanischen Museum der Universität Zürich 28:255-256 (1906) for original description and Madroño 3(7):265-320 (1936) for taxonomic treatment.
Threats:
Taxonomy:

Selected References

CRPR List Change on 2013-06-24
Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 3 January 2025].