Taxon Report

Rhamnus pirifolia Greene

island redberry

Print Report


Taxon Summary

Rhamnus pirifolia, commonly known as island redberry, is a perennial evergreen tree in the Rhamnaceae that is found in California and elsewhere. It occurs within Chaparral, Cismontane woodland, Closed-cone coniferous forest, and Coastal scrub, growing at elevations from 20 to 430 meters. Rhamnus pirifolia is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.


  Classification

Scientific Name:
Rhamnus pirifolia Greene
Common Name:
island redberry
Family: Rhamnaceae
Element Code: PDRHA0C0A0
USDA Plants Symbol: RHPI
Synonyms/Other Names:

Ecology and Life History

Lifeform: perennial evergreen tree
Blooming Period: Feb-Jul Feb-Jul
Elevation: 20-430 (65-1410)
General Habitats: Chaparral, Cismontane woodland, Closed-cone coniferous forest, Coastal scrub
Microhabitat:
Microhabitat Details:

Occurrence Data from the CNDDB

Total Occurrences: 0
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 0
   Fair (C) 0
   Poor (D) 0
   None (X) 0
   Unknown (U) 0
California Endemic:  False
California Counties and Islands: Name (Code)
Los Angeles (LAX), Santa Barbara (SBA)
Quads: Name (Quad Code)
San Clemente Island Central (3211874), San Clemente Island South (3211873), Santa Catalina East (3311833), Santa Catalina North (3311844), Santa Catalina South (3311834), Santa Catalina West (3311845), Santa Cruz Island B (3311986), Santa Cruz Island C (3311985), Santa Rosa Island South (3312071)

Notes

Threatened by non-native feral herbivores on SCI Isl. Possibly threatened by development. See Pittonia 3:15 (1896) 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 19 March 2025].