CNPS

CNPS Rare Plant Inventory



Taxon Details

Hoffmannseggia peninsularis

Baja peninsula rushpea

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Photo of Hoffmannseggia peninsularis
© 2019 Joey Malone 		Photo of Hoffmannseggia peninsularis
© 2019 Joey Malone

Taxon Summary:

Hoffmannseggia peninsularis, commonly known as Baja peninsula rushpea, is a perennial shrub in the Fabaceae that is found in California and elsewhere. It occurs within Sonoran desert scrub, growing at elevations from 255 to 275 meters. Hoffmannseggia peninsularis is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

  Classification

Scientific Name:
Hoffmannseggia peninsularis (Britton) Wiggins
Common Name:
Baja peninsula rushpea
Family: Fabaceae
Element Code: PDFAB20060
USDA Plants Symbol:
Synonyms/Other Names:
Name Status: JEF, FNA, POWO,
IPNI, Tropicos

  Conservation Status

CA Rare Plant Rank: 1B.1
Fed List: None
State List: None
Global Rank: G2
State Rank:
 S1
Other Status:
CRPR Changes:
added to 1B.1 on 2023-01-20
Add Date: 2023-01-20
Date Edited: 2023-07-07

  Ecology and Life History

Lifeform: perennial shrub
Blooming Period: Jan-Mar
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Elevation:
255 - 275 meters
835 - 900 feet
General Habitats:
  • Sonoran desert scrub
Microhabitat Details: In sparse vegetation on igneous/metamorphic bedrock slopes.
Microhabitat:
  • Gravelly
  • Metamorphic (sometimes)
  • Rocky
  • Volcanic (sometimes)

  Notes

Notes:
Documented in California in the Chocolate Mtns. of IMP Co. in 2016 by A. Sanders. Not yet included in the Jepson eFlora.
Threats:
Potentially threatened by military activities,  invasive plants, and small population size.
Taxonomy:
Similar to H. intricata and H. microphylla; differs in being nearly prostrate and having zig-zag branching, sticky, glandular trichomes on its young growth, and flowers 3–4 mm long (H. intricata is also not known from California). 

  Threat List Data from the CNDDB

Threat List Total: 0
Total EOs % of EOs
EOs with Threat Listed: 0 %
THREAT LIST:

 

  Occurrence Data from the CNDDB

Total Occurrences: 2
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 2
Occurrence Status:
Historical >20 Years 0
Recent <=20 Years 2
Presence:
Presumed Extant 2
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
Baja California (BA), California (CA)
California Counties and Islands: Name (Code)
Imperial (IMP)
Quads: Name (Quad Code)
Tortuga (3311523)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Regional Map

  Map

Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

CNPS Status Review: Proposed Addition to CRPR 1B.1 (2023)
Original Description: North American Flora, Volume 23 (5): 311 (1930)
Taxonomic Treatment: Lundellia 2: 14–54 (1999)
Taxonomic Treatment: Lundellia 9: 7–33 (2006)

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Suggested Citation:
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].
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