Ambrosia psilostachya

Western ragweed

  • Height:   1 ft - 5 ft
  • Life Cycle:   perennial
  • Growth Type:   shrub
  • Flower Size:   minute
  • Inflorescence Size:   1 - 5 in
  • Flower Type:   clustered
  • Bloom Type:   summer
  • Flower Color:   green
  • Native to California:   YES
  • California Range:   coast - inland
  • Water Requirements:   low
  • Average Live Seed per Bulk Pound:   25,000
  • 15353
  • 15354
1535315354

Taxon report data from Calflora

Recommended Source for Photos:

View Ambrosia psilostachya at Calflora.com

Other Sources: Picasa | Flickr | Google Images

Ambrosia psilostachya

Common Name:Ragweed

Ambrosia psilostachya, a dicot, is a perennial herb that is native to California.

US Distribution:
Plant Community(s):weed, species characteristic of disturbed places,
Habitat:disturbed
Family:Asteraceae

Name Status:

Recognized as current in TJM2 + PLANTS + JM93

County distribution list:

Alameda, Butte, Calaveras, ContraCosta, Colusa, El Dorado, Glenn, Humboldt, Inyo, Los Angeles, Mendocino, Merced, Monterey, Marin, Napa, Nevada, Orange, Plumas, Riverside, Sacramento, Santa Barbara, San Bernardino, San Benito, Santa Cruz, San Diego, San Francisco, Shasta, Siskiyou, San Joaquin, San Luis Obispo, San Mateo, Solano, Sonoma, Stanislaus, Sutter, Tehama, Tulare, Ventura, Yolo, Yuba

See a detailed Distribution Grid of this plant in Calfornia.

Links: USDA Plants Profile | Jepson Herbarium

Website references on Google

Bloom Months
(Blooming months in blue)