Taxon Report

Rosa pinetorum Heller

pine rose

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Taxon Summary

Rosa pinetorum, commonly known as pine rose, is a perennial shrub in the Rosaceae that is found only in California. It occurs within Cismontane woodland, and Closed-cone coniferous forest, growing at elevations from 2 to 945 meters. Rosa pinetorum is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.


Ecology and Life History

Lifeform: perennial shrub
Blooming Period: May-Jul May-Jul
Elevation: 2-945 (5-3100)
General Habitats: Cismontane woodland, Closed-cone coniferous forest
Microhabitat:
Microhabitat Details:

Occurrence Data from the CNDDB

Total Occurrences: 14
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 3
   Fair (C) 1
   Poor (D) 0
   None (X) 2
   Unknown (U) 8
California Endemic:  True
California Counties and Islands: Name (Code)
Monterey (MNT), Santa Cruz (SCR)
Quads: Name (Quad Code)
Ano Nuevo (3712213), Chews Ridge (3612135), Cone Peak (3612114), Lopez Point (3612115), Monterey (3612158), Prunedale (3612176), Seaside (3612157), Soberanes Point (3612148)

Threat List Data from the CNDDB

Threat List Total: 7
EOs with Threat Listed: Total EOs % of EOs
4 29 %
Development 2 14%
Erosion/runoff 1 7%
Foot traffic/trampling 1 7%
Non-native plant impacts 1 7%
Other 1 7%
Road/trail construction/maint. 1 7%
Biocides 1 7%

Notes

Possible hybrid of R. spithamea, R. gymnocarpa, or others; needs further study. See Muhlenbergia 1:53 (1904) for original description.
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 13 March 2025].