Taxon Report

Arctostaphylos parryana Lemmon ssp. tumescens Keeley, Boykin, & Massihi

interior manzanita

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Taxon Summary

Arctostaphylos parryana ssp. tumescens, commonly known as interior manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral (montane), and Cismontane woodland, growing at elevations from 2100 to 2310 meters. Arctostaphylos parryana ssp. tumescens is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.


  Classification

Scientific Name:
Arctostaphylos parryana Lemmon ssp. tumescens Keeley, Boykin, & Massihi
Common Name:
interior manzanita
Family: Ericaceae
Element Code: PDERI042A1
USDA Plants Symbol: ARPAT
Synonyms/Other Names:

Ecology and Life History

Lifeform: perennial evergreen shrub
Blooming Period: Feb-Apr Feb-Apr
Elevation: 2100-2310 (6890-7580)
General Habitats: Chaparral, Cismontane woodland
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:  True
California Counties and Islands: Name (Code)
Los Angeles (LAX), Riverside (RIV), San Bernardino (SBD)
Quads: Name (Quad Code)
Acton (3411842), Anza (3311656), Chilao Flat (3411831), Idyllwild (3311666), Juniper Hills (3411748), Moonridge (3411627), Onyx Peak (3411626), Pacifico Mountain (3411841), Waterman Mtn. (3411738)

Notes

Not in The Jepson Manual. See MadroƱo 44(3):264 (1997) 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 4 July 2025].