Index / Search / Conium maculatum
§1 Plant
Conium maculatum L.
vernacular poison hemlock — species · Apiaceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Biennial
- Group
- Dicot
- Family
- Apiaceae Lindl.
- Genus
- Conium
§2a
Native status, by region
- CAN Canada Introduced
- L48 Lower 48 States Introduced
§2b
County-level range
· 887 counties across 45 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 887 counties across 45 states/territories.
Alabama view state ↗ 2 I ▾
Arizona view state ↗ 6 I ▾
Arkansas view state ↗ 7 I ▾
California view state ↗ 39 I ▾
- Alameda 06001
- Butte 06007
- Contra Costa 06013
- Del Norte 06015
- Glenn 06021
- Humboldt 06023
- Kern 06029
- Lake 06033
- Los Angeles 06037
- Marin 06041
- Mendocino 06045
- Merced 06047
- Modoc 06049
- Mono 06051
- Monterey 06053
- Napa 06055
- Nevada 06057
- Orange 06059
- Placer 06061
- 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
- Siskiyou 06093
- Solano 06095
- Sonoma 06097
- Tehama 06103
- Tuolumne 06109
- Ventura 06111
- Yolo 06113
Colorado view state ↗ 16 I ▾
Delaware view state ↗ 1 I ▾
District of Columbia view state ↗ 1 I ▾
Georgia view state ↗ 1 I ▾
Idaho view state ↗ 42 I ▾
- Ada 16001
- Adams 16003
- Bannock 16005
- Bear Lake 16007
- Benewah 16009
- Bingham 16011
- Blaine 16013
- Boise 16015
- Bonner 16017
- Bonneville 16019
- Boundary 16021
- Butte 16023
- Canyon 16027
- Caribou 16029
- Cassia 16031
- Clark 16033
- Clearwater 16035
- Custer 16037
- Elmore 16039
- Franklin 16041
- Fremont 16043
- Gem 16045
- Gooding 16047
- Idaho 16049
- Jefferson 16051
- Jerome 16053
- Kootenai 16055
- Latah 16057
- Lemhi 16059
- Lewis 16061
- Lincoln 16063
- Madison 16065
- Minidoka 16067
- Nez Perce 16069
- Oneida 16071
- Owyhee 16073
- Payette 16075
- Power 16077
- Teton 16081
- Twin Falls 16083
- Valley 16085
- Washington 16087
Illinois view state ↗ 64 I ▾
- Adams 17001
- Alexander 17003
- Bond 17005
- Brown 17009
- Bureau 17011
- Cass 17017
- Champaign 17019
- Clark 17023
- Clinton 17027
- Coles 17029
- Crawford 17033
- Cumberland 17035
- De Witt 17039
- Douglas 17041
- DuPage 17043
- Edgar 17045
- Edwards 17047
- Effingham 17049
- Fayette 17051
- Ford 17053
- Fulton 17057
- Greene 17061
- Grundy 17063
- Hancock 17067
- Henderson 17071
- Henry 17073
- Jackson 17077
- Jefferson 17081
- Jo Daviess 17085
- Kane 17089
- Kankakee 17091
- Kendall 17093
- Lawrence 17101
- Lee 17103
- Logan 17107
- Macon 17115
- Madison 17119
- Marion 17121
- Marshall 17123
- Mason 17125
- McDonough 17109
- McLean 17113
- Menard 17129
- Mercer 17131
- Morgan 17137
- Moultrie 17139
- Peoria 17143
- Perry 17145
- Piatt 17147
- Pike 17149
- Pulaski 17153
- Sangamon 17167
- Schuyler 17169
- Scott 17171
- St. Clair 17163
- Stark 17175
- Tazewell 17179
- Union 17181
- Vermilion 17183
- Wabash 17185
- Washington 17189
- Wayne 17191
- Will 17197
- Williamson 17199
Indiana view state ↗ 28 I ▾
- Allen 18003
- Carroll 18015
- Cass 18017
- Clark 18019
- Crawford 18025
- Dearborn 18029
- Floyd 18043
- Fountain 18045
- Franklin 18047
- Henry 18065
- Howard 18067
- Huntington 18069
- Jackson 18071
- Jefferson 18077
- Kosciusko 18085
- Lawrence 18093
- Miami 18103
- Monroe 18105
- Montgomery 18107
- Rush 18139
- St. Joseph 18141
- Sullivan 18153
- Switzerland 18155
- Tippecanoe 18157
- Vigo 18167
- Wabash 18169
- Wayne 18177
- Wells 18179
Iowa view state ↗ 8 I ▾
Kansas view state ↗ 83 I ▾
- Allen 20001
- Anderson 20003
- Atchison 20005
- Barber 20007
- Barton 20009
- Bourbon 20011
- Brown 20013
- Butler 20015
- Chase 20017
- Chautauqua 20019
- Cherokee 20021
- Cheyenne 20023
- Clay 20027
- Cloud 20029
- Coffey 20031
- Comanche 20033
- Cowley 20035
- Crawford 20037
- Decatur 20039
- Dickinson 20041
- Doniphan 20043
- Douglas 20045
- Edwards 20047
- Elk 20049
- Ellis 20051
- Ellsworth 20053
- Ford 20057
- Franklin 20059
- Geary 20061
- Graham 20065
- Grant 20067
- Greenwood 20073
- Harper 20077
- Harvey 20079
- Hodgeman 20083
- Jackson 20085
- Jefferson 20087
- Jewell 20089
- Johnson 20091
- Kingman 20095
- Kiowa 20097
- Labette 20099
- Leavenworth 20103
- Lincoln 20105
- Linn 20107
- Lyon 20111
- Marshall 20117
- McPherson 20113
- Miami 20121
- Mitchell 20123
- Montgomery 20125
- Morris 20127
- Nemaha 20131
- Norton 20137
- Osage 20139
- Osborne 20141
- Ottawa 20143
- Pawnee 20145
- Phillips 20147
- Pottawatomie 20149
- Pratt 20151
- Rawlins 20153
- Reno 20155
- Republic 20157
- Rice 20159
- Riley 20161
- Rooks 20163
- Rush 20165
- Russell 20167
- Saline 20169
- Scott 20171
- Sedgwick 20173
- Shawnee 20177
- Sheridan 20179
- Smith 20183
- Stafford 20185
- Sumner 20191
- Thomas 20193
- Wabaunsee 20197
- Washington 20201
- Wilson 20205
- Woodson 20207
- Wyandotte 20209
Kentucky view state ↗ 38 I ▾
- Anderson 21005
- Barren 21009
- Bourbon 21017
- Boyle 21021
- Bracken 21023
- Campbell 21037
- Carlisle 21039
- Carroll 21041
- Clark 21049
- Estill 21065
- Fayette 21067
- Floyd 21071
- Franklin 21073
- Garrard 21079
- Greenup 21089
- Hardin 21093
- Harlan 21095
- Hart 21099
- Jackson 21109
- Jefferson 21111
- Jessamine 21113
- Kenton 21117
- Lee 21129
- Lewis 21135
- Madison 21151
- Magoffin 21153
- Marion 21155
- Martin 21159
- Mercer 21167
- Montgomery 21173
- Nelson 21179
- Oldham 21185
- Pendleton 21191
- Robertson 21201
- Scott 21209
- Spencer 21215
- Trimble 21223
- Woodford 21239
Louisiana view state ↗ 2 I ▾
Maine view state ↗ 3 I ▾
Massachusetts view state ↗ 10 I ▾
Michigan view state ↗ 19 I ▾
Minnesota view state ↗ 2 I ▾
Missouri view state ↗ 56 I ▾
- Adair 29001
- Andrew 29003
- Audrain 29007
- Barry 29009
- Bates 29013
- Benton 29015
- Boone 29019
- Buchanan 29021
- Caldwell 29025
- Carroll 29033
- Cass 29037
- Christian 29043
- Clark 29045
- Clay 29047
- Clinton 29049
- Cole 29051
- Daviess 29061
- DeKalb 29063
- Gentry 29075
- Greene 29077
- Harrison 29081
- Holt 29087
- Jackson 29095
- Jasper 29097
- Johnson 29101
- Knox 29103
- Laclede 29105
- Lafayette 29107
- Lawrence 29109
- Lewis 29111
- Lincoln 29113
- Linn 29115
- Livingston 29117
- Madison 29123
- Marion 29127
- New Madrid 29143
- Newton 29145
- Nodaway 29147
- Pettis 29159
- Pike 29163
- Platte 29165
- Putnam 29171
- Ray 29177
- Ripley 29181
- Saline 29195
- Scotland 29199
- Shelby 29205
- St. Clair 29185
- St. Francois 29187
- St. Louis 29189
- Stone 29209
- Taney 29213
- Texas 29215
- Warren 29219
- Washington 29221
- Wright 29229
Montana view state ↗ 33 I ▾
- Beaverhead 30001
- Big Horn 30003
- Blaine 30005
- Broadwater 30007
- Carbon 30009
- Cascade 30013
- Chouteau 30015
- Daniels 30019
- Dawson 30021
- Fallon 30025
- Fergus 30027
- Flathead 30029
- Gallatin 30031
- Glacier 30035
- Golden Valley 30037
- Jefferson 30043
- Lake 30047
- Lewis and Clark 30049
- Lincoln 30053
- Madison 30057
- Meagher 30059
- Missoula 30063
- Musselshell 30065
- Park 30067
- Powder River 30075
- Powell 30077
- Roosevelt 30085
- Rosebud 30087
- Silver Bow 30093
- Stillwater 30095
- Toole 30101
- Wibaux 30109
- Yellowstone 30111
Nebraska view state ↗ 30 I ▾
- Box Butte 31013
- Brown 31017
- Chase 31029
- Cherry 31031
- Clay 31035
- Cuming 31039
- Dawes 31045
- Deuel 31049
- Dodge 31053
- Fillmore 31059
- Gage 31067
- Gosper 31073
- Hall 31079
- Holt 31089
- Jefferson 31095
- Johnson 31097
- Keith 31101
- Kimball 31105
- Knox 31107
- Lancaster 31109
- Nemaha 31127
- Nuckolls 31129
- Otoe 31131
- Richardson 31147
- Saline 31151
- Saunders 31155
- Sherman 31163
- Washington 31177
- Wayne 31179
- Webster 31181
Nevada view state ↗ 9 I ▾
New Hampshire view state ↗ 3 I ▾
New Jersey view state ↗ 15 I ▾
New Mexico view state ↗ 4 I ▾
New York view state ↗ 23 I ▾
- Bronx 36005
- Cayuga 36011
- Cortland 36023
- Delaware 36025
- Erie 36029
- Jefferson 36045
- Kings 36047
- Madison 36053
- Nassau 36059
- Oneida 36065
- Orange 36071
- Queens 36081
- Rensselaer 36083
- Richmond 36085
- Schoharie 36095
- Schuyler 36097
- Suffolk 36103
- Tioga 36107
- Tompkins 36109
- Ulster 36111
- Washington 36115
- Wayne 36117
- Westchester 36119
North Carolina view state ↗ 15 I ▾
North Dakota view state ↗ 4 I ▾
Ohio view state ↗ 49 I ▾
- Adams 39001
- Allen 39003
- Ashland 39005
- Ashtabula 39007
- Auglaize 39011
- Butler 39017
- Champaign 39021
- Clark 39023
- Clinton 39027
- Coshocton 39031
- Crawford 39033
- Cuyahoga 39035
- Darke 39037
- Delaware 39041
- Erie 39043
- Fairfield 39045
- Fayette 39047
- Franklin 39049
- Greene 39057
- Hamilton 39061
- Highland 39071
- Holmes 39075
- Knox 39083
- Lake 39085
- Lawrence 39087
- Licking 39089
- Lorain 39093
- Madison 39097
- Meigs 39105
- Mercer 39107
- Miami 39109
- Monroe 39111
- Montgomery 39113
- Ottawa 39123
- Pickaway 39129
- Pike 39131
- Putnam 39137
- Richland 39139
- Ross 39141
- Scioto 39145
- Stark 39151
- Trumbull 39155
- Union 39159
- Warren 39165
- Washington 39167
- Wayne 39169
- Williams 39171
- Wood 39173
- Wyandot 39175
Oklahoma view state ↗ 9 I ▾
Oregon view state ↗ 25 I ▾
- Benton 41003
- Clackamas 41005
- Clatsop 41007
- Columbia 41009
- Coos 41011
- Crook 41013
- Curry 41015
- Douglas 41019
- Harney 41025
- Jackson 41029
- Josephine 41033
- Klamath 41035
- Lake 41037
- Lane 41039
- Linn 41043
- Marion 41047
- Multnomah 41051
- Polk 41053
- Sherman 41055
- Umatilla 41059
- Union 41061
- Wallowa 41063
- Wasco 41065
- Washington 41067
- Yamhill 41071
Pennsylvania view state ↗ 36 I ▾
- Adams 42001
- Allegheny 42003
- Beaver 42007
- Bedford 42009
- Berks 42011
- Blair 42013
- Bradford 42015
- Bucks 42017
- Centre 42027
- Chester 42029
- Crawford 42039
- Cumberland 42041
- Delaware 42045
- Erie 42049
- Franklin 42055
- Fulton 42057
- Greene 42059
- Huntingdon 42061
- Juniata 42067
- Lackawanna 42069
- Lancaster 42071
- Lehigh 42077
- Luzerne 42079
- Mifflin 42087
- Montgomery 42091
- Montour 42093
- Northampton 42095
- Philadelphia 42101
- Potter 42105
- Snyder 42109
- Tioga 42117
- Warren 42123
- Washington 42125
- Wayne 42127
- Wyoming 42131
- York 42133
Rhode Island view state ↗ 1 I ▾
South Carolina view state ↗ 6 I ▾
South Dakota view state ↗ 6 I ▾
Tennessee view state ↗ 20 I ▾
Texas view state ↗ 8 I ▾
Utah view state ↗ 17 I ▾
Vermont view state ↗ 9 I ▾
Virginia view state ↗ 64 I ▾
- Albemarle 51003
- Amherst 51009
- Appomattox 51011
- Augusta 51015
- Bath 51017
- Bedford 51019
- Botetourt 51023
- Buckingham 51029
- Campbell 51031
- Caroline 51033
- Carroll 51035
- Charles City 51036
- Charlotte 51037
- Chesapeake (city) 51550
- Chesterfield 51041
- Clarke 51043
- Craig 51045
- Culpeper 51047
- Cumberland 51049
- Fairfax 51059
- Fauquier 51061
- Floyd 51063
- Fluvanna 51065
- Franklin 51067
- Frederick 51069
- Giles 51071
- Goochland 51075
- Grayson 51077
- Hampton (city) 51650
- Hanover 51085
- Henrico 51087
- Highland 51091
- Isle of Wight 51093
- King George 51099
- Lee 51105
- Loudoun 51107
- Montgomery 51121
- Nelson 51125
- New Kent 51127
- Orange 51137
- Page 51139
- Pittsylvania 51143
- Powhatan 51145
- Prince George 51149
- Prince William 51153
- Pulaski 51155
- Roanoke 51161
- Rockbridge 51163
- Rockingham 51165
- Russell 51167
- Scott 51169
- Shenandoah 51171
- Smyth 51173
- Southampton 51175
- Spotsylvania 51177
- Suffolk (city) 51800
- Surry 51181
- Sussex 51183
- Tazewell 51185
- Virginia Beach (city) 51810
- Warren 51187
- Washington 51191
- Wythe 51197
- York 51199
Washington view state ↗ 35 I ▾
- Adams 53001
- Asotin 53003
- Benton 53005
- Chelan 53007
- Clallam 53009
- Clark 53011
- Columbia 53013
- Cowlitz 53015
- Ferry 53019
- Franklin 53021
- Garfield 53023
- Grays Harbor 53027
- Island 53029
- Jefferson 53031
- King 53033
- Kitsap 53035
- Kittitas 53037
- Klickitat 53039
- Lewis 53041
- Lincoln 53043
- Okanogan 53047
- Pend Oreille 53051
- Pierce 53053
- San Juan 53055
- Skagit 53057
- Skamania 53059
- Snohomish 53061
- Spokane 53063
- Stevens 53065
- Thurston 53067
- Wahkiakum 53069
- Walla Walla 53071
- Whatcom 53073
- Whitman 53075
- Yakima 53077
West Virginia view state ↗ 21 I ▾
Wisconsin view state ↗ 6 I ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/COMA2 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3034807 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z