Index / Search / Conyza bonariensis
§1 Plant
Conyza bonariensis (L.) Cronquist
vernacular asthmaweed — species · Asteraceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Annual, Biennial
- Group
- Dicot
- Family
- Asteraceae Bercht. & J. Presl
- Genus
- Conyza
§2a
Native status, by region
- L48 Lower 48 States Introduced
- PB Pacific Basin (except Hawaii) Introduced
§2b
County-level range
· 156 counties across 18 states/territories§3Cultivation
No cultivation specs.
USDA has not characterised this taxon. Roughly four out of five plants in the database lack the detailed cultivation record present here — typically because they have not been the focus of NRCS Plant Materials work. Range and distribution data are unaffected.
§4Counties, by state
Recorded in 156 counties across 18 states/territories.
Alabama view state ↗ 4 I ▾
Arizona view state ↗ 3 I ▾
Arkansas view state ↗ 2 I ▾
California view state ↗ 32 I ▾
- Alameda 06001
- Butte 06007
- Contra Costa 06013
- El Dorado 06017
- Glenn 06021
- Inyo 06027
- Kern 06029
- Los Angeles 06037
- Marin 06041
- Merced 06047
- Monterey 06053
- Napa 06055
- Orange 06059
- Plumas 06063
- Riverside 06065
- Sacramento 06067
- San Bernardino 06071
- San Diego 06073
- San Francisco 06075
- San Joaquin 06077
- San Luis Obispo 06079
- San Mateo 06081
- Santa Barbara 06083
- Santa Clara 06085
- Santa Cruz 06087
- Shasta 06089
- Solano 06095
- Sonoma 06097
- Stanislaus 06099
- Sutter 06101
- Tehama 06103
- Ventura 06111
Colorado view state ↗ 1 I ▾
Florida view state ↗ 18 I ▾
Georgia view state ↗ 4 I ▾
Louisiana view state ↗ 51 I ▾
- Acadia 22001
- Bossier 22015
- Caddo 22017
- Calcasieu 22019
- Caldwell 22021
- Cameron 22023
- Catahoula 22025
- Claiborne 22027
- Concordia 22029
- De Soto 22031
- East Baton Rouge 22033
- East Carroll 22035
- East Feliciana 22037
- Franklin 22041
- Grant 22043
- Iberia 22045
- Jefferson 22051
- Jefferson Davis 22053
- Lafayette 22055
- Lafourche 22057
- LaSalle 22059
- Lincoln 22061
- Livingston 22063
- Madison 22065
- Morehouse 22067
- Natchitoches 22069
- Orleans 22071
- Ouachita 22073
- Plaquemines 22075
- Pointe Coupee 22077
- Rapides 22079
- Red River 22081
- Sabine 22085
- St. Bernard 22087
- St. Charles 22089
- St. Helena 22091
- St. John the Baptist 22095
- St. Martin 22099
- St. Mary 22101
- St. Tammany 22103
- Tensas 22107
- Terrebonne 22109
- Union 22111
- Vermilion 22113
- Vernon 22115
- Washington 22117
- Webster 22119
- West Baton Rouge 22121
- West Carroll 22123
- West Feliciana 22125
- Winn 22127
Mississippi view state ↗ 3 I ▾
Nevada view state ↗ 1 I ▾
New Mexico view state ↗ 3 I ▾
North Carolina view state ↗ 6 I ▾
Oregon view state ↗ 3 I ▾
South Carolina view state ↗ 10 I ▾
Texas view state ↗ 7 I ▾
Utah view state ↗ 2 I ▾
Virginia view state ↗ 5 I ▾
Washington view state ↗ 1 I ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/COBO ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3146717 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z