Ambrosia pumila
Common Name: San Diego ambrosia
Family: Asteraceae
Synonyms:
Element Code: PDAST0C0M0
Full Name: Ambrosia pumila (Nutt.) Gray
USDA PLANTS Symbol: AMPU4

© 2005 Vince Scheidt
Biology Glossary
  • Lifeform: perennial rhizomatous herb
  • Blooming Period: April - October
  • Habitat: sandy loam or clay, often in disturbed areas, sometimes alkaline.
    • Chaparral
    • Coastal scrub
    • Valley and foothill grassland
    • Vernal pools
Rarity Status Glossary
Occurrence Data from DFG
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 55
  • Element Occurrence Ranks:
    A B C D X U
    2 2 12 5 22 12
    • Population Status:
    Historic
    >20 yrs    		 Recent
    <=20 yrs
    19 36
  • Presence:
    Present Extant Possibly Extirpated Extirpated
    33 9 13
Notes Glossary
  • Threatened by development, non-native plants, vehicles, road maintenance, and foot traffic. Confused with A. confertiflora, but the two are quite distinct. See Madroño 39(2):157 (1992) for first RIV Co. record.
  • To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
  • Date Added: 1974-01-01
  • Last Update: 2011-11-22
Location Glossary
  • Elevation: 20 - 415 meters
  • California Endemic: no
  • States: California, Baja California
  • California Counties and Islands:   name (code)
    Riverside (RIV),  San Diego (SDG)
  • Quads:   name (DWR code) USGS code
    Barrett Lake (009B) 32116F6,  Jamul Mountains (010B) 32116F8,  National City (011A) 32117F1,  Imperial Beach (011D) 32117E1,  El Cajon (021C) 32116G8,  Del Mar (022B) 32117H2,  La Jolla (022C) 32117G2,  La Mesa (022D) 32117G1,  San Marcos (035B) 33117B2,  Rancho Santa Fe (035C) 33117A2,  Escondido (035D) 33117A1,  San Luis Rey (036A) 33117B3,  Aguanga (049A) 33116D7,  Temecula (050B) 33117D2,  Bonsall (050C) 33117C2,  Murrieta (068C) 33117E2,  Bachelor Mtn. (068D) 33117E1,  Lake Elsinore (069A) 33117F3,  Alberhill (069B) 33117F4,  Riverside West (086B)* 33117H4
  • Notes:
      Definitions of codes preceding a county and/or quad:
      * Presumed extirpated
      ? Uncertain about distribution or identity
      ?* Uncertain about distribution, but presumed extirpated if once present
      (?) Occurrence confirmed, but possibly extirpated
      Species may be present in other areas where conditions are favorable.
Presumed Extant Presumed Extirpated or Unknown 1
Links to Leading Resources of Taxon Information
Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .
-117.125,33.125

CA,BA
32116F6=Barrett Lake (009B) 32116F6,32116F8=Jamul Mountains (010B) 32116F8,32117F1=National City (011A) 32117F1,32117E1=Imperial Beach (011D) 32117E1,32116G8=El Cajon (021C) 32116G8,32117H2=Del Mar (022B) 32117H2,32117G2=La Jolla (022C) 32117G2,32117G1=La Mesa (022D) 32117G1,33117B2=San Marcos (035B) 33117B2,33117A2=Rancho Santa Fe (035C) 33117A2,33117A1=Escondido (035D) 33117A1,33117B3=San Luis Rey (036A) 33117B3,33116D7=Aguanga (049A) 33116D7,33117D2=Temecula (050B) 33117D2,33117C2=Bonsall (050C) 33117C2,33117E2=Murrieta (068C) 33117E2,33117E1=Bachelor Mtn. (068D) 33117E1,33117F3=Lake Elsinore (069A) 33117F3,33117F4=Alberhill (069B) 33117F4,33117H4=Riverside West (086B)* 33117H4