Index / Search / Silybum marianum
§1 Plant
Silybum marianum (L.) Gaertn.
vernacular blessed milkthistle — species · Asteraceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Annual, Biennial
- Group
- Dicot
- Family
- Asteraceae Bercht. & J. Presl
- Genus
- Silybum
§2a
Native status, by region
- CAN Canada Introduced
- L48 Lower 48 States Introduced
§2b
County-level range
· 113 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 113 counties across 18 states/territories.
Arizona view state ↗ 5 I ▾
Arkansas view state ↗ 3 I ▾
California view state ↗ 34 I ▾
- Alameda 06001
- Amador 06005
- Butte 06007
- Contra Costa 06013
- Glenn 06021
- Humboldt 06023
- Kern 06029
- Lake 06033
- Los Angeles 06037
- Madera 06039
- Marin 06041
- Mendocino 06045
- Merced 06047
- Monterey 06053
- Napa 06055
- Nevada 06057
- Orange 06059
- Plumas 06063
- Riverside 06065
- Sacramento 06067
- San Diego 06073
- San Francisco 06075
- San Joaquin 06077
- San Luis Obispo 06079
- San Mateo 06081
- Santa Barbara 06083
- Santa Clara 06085
- Solano 06095
- Sonoma 06097
- Stanislaus 06099
- Tehama 06103
- Tuolumne 06109
- Ventura 06111
- Yolo 06113
District of Columbia view state ↗ 1 I ▾
Louisiana view state ↗ 6 I ▾
Michigan view state ↗ 3 I ▾
Nevada view state ↗ 2 I ▾
New Hampshire view state ↗ 1 I ▾
New Mexico view state ↗ 1 I ▾
New York view state ↗ 6 I ▾
Ohio view state ↗ 7 I ▾
Oregon view state ↗ 13 I ▾
Pennsylvania view state ↗ 2 I ▾
Tennessee view state ↗ 1 I ▾
Texas view state ↗ 13 I ▾
Virginia view state ↗ 2 I ▾
Washington view state ↗ 11 I ▾
West Virginia view state ↗ 2 I ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/SIMA3 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3145214 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z