Taxon Report

Rosa minutifolia Engelm.

small-leaved rose

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Taxon Summary

Rosa minutifolia, commonly known as small-leaved rose, is a perennial deciduous shrub in the Rosaceae that is found in California and elsewhere. It occurs within Chaparral, and Coastal scrub, growing at elevations from 150 to 160 meters. Rosa minutifolia is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.


  Classification

Scientific Name:
Rosa minutifolia Engelm.
Common Name:
small-leaved rose
Family: Rosaceae
Element Code: PDROS1J1B0
USDA Plants Symbol: ROMI80
Synonyms/Other Names:

Ecology and Life History

Lifeform: perennial deciduous shrub
Blooming Period: Jan-Jun Jan-Jun
Elevation: 150-160 (490-525)
General Habitats: Chaparral, Coastal scrub
Microhabitat:
Microhabitat Details:

Conservation Status

CA Rare Plant Rank: 2B.1
Global Rank: G2G3
State Rank:
SX.C
State List: CE
Fed List: None
Other Status: SB_CalBG/RSABG; SB_CRES
CRPR Changes:
  • changed from 2.1 to 2B.1 on 2013-06-12

Occurrence Data from the CNDDB

Total Occurrences: 3
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 1
   Fair (C) 0
   Poor (D) 0
   None (X) 1
   Unknown (U) 1
California Endemic:  False
California Counties and Islands: Name (Code)
San Diego (SDG)
Quads: Name (Quad Code)
Imperial Beach (3211751)

Threat List Data from the CNDDB

Threat List Total: 4
EOs with Threat Listed: Total EOs % of EOs
2 67 %
Development 1 33%
Non-native plant impacts 1 33%
ORV activity 1 33%
Wood cutting or brush clearing 1 33%

Notes

Known in CA from only one occurrence on Otay Mesa. Only CA occurrence transplanted for mitigation in 1997. Seriously threatened by development and vehicles. Possibly threatened by non-native plants. See MadroƱo 33(2):150 (1986) for first CA record.
Threats:
Taxonomy:
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].