Ageratina altissima

Family:ASTERACEAE
Species:Ageratina altissima (Linnaeus) King & H.E. Robinson
Common Name:Common White Snakeroot; Common Milk Poison
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Annual
Category:Vascular
USDA Symbol:**
Plant Notes:Common White Snakeroot is a native herbaceous perennial in the Sunflower family (Asteraceae). It is native to the northern 3/4’s of Alabama. Common White Snakeroot occurs along streams, in moist hardwood forests, in prairie woods, and in hardwood ravines. It is a perennial with a short rhizome or woody crown. The stems are erect, 2-5 feet in height, pubescent, green in color, and branched above the middle. Leaves are opposite, petiolate, ovate to lanceolate in outline, doubly serrate, 3-nerved from the base, and glabrous or slightly pubescent. The flowers are produced in heads. The heads are arranged in corymbs. Each head has 5 white disc flowers and no ray flowers. The fruit is an achene. Common White snakeroot contains the toxic compound tremetol which causes trembling, vomiting, and severe intestinal pain when the plant is consumed. If the plant is consumed by cattle, the toxin can be passed to humans through the milk causing Milk sickness. Milk sickness was possibly the cause of death of Nancy Hanks Lincoln, mother of Abraham Lincoln. Common White Snakeroot is available from some wildflower nurseries. It prefers a location with partial shade and moist, humus-rich soil.—A. Diamond
Taxonomic Notes:**
Status:Native, FACU (NWI)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyASTERACEAE - Aster family
Genus Ageratina
Species Ageratina altissima (Linnaeus) King & H.E. Robinson - Common White Snakeroot; Common Milk Poison

Citation

Citation AGERATINA ALTISSIMA (Linnaeus) R. M. King & H. Robinson, Phytologia 19: 212. 1970.
Basionym: Ageratum altissimum Linnaeus 1753.
Type: Without data, Herb. Clifford 396, Eupatorium no. 3 (lectotype: BM). Lectotypified by Reveal, in C. E. Jarvis & Turland, Taxon 47: 351. 1998.

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Ageratina luciae-brauniae Ageratina luciae-brauniae (Fernald) R. M. King & H. Robinson, Phytologia 19: 215. 1970.Eupatorium luciae-brauniae Fernald 1942; Eupatorium deltoides E. L. Braun 1940, non Jacquin 1798. 
Ageratum altissimum Ageratum altissimum Linnaeus, Sp. Pl. 839. 1753. Without data, Herb. Clifford 396, Eupatorium no. 3 (lectotype: BM). Lectotypified by Reveal, in C. E. Jarvis & Turland, Taxon 47: 351. 1998
Batschia nivea Batschia nivea Moench, Methodus 567. 1794, nom. illegit.Ageratum altissimum Linnaeus 1753. 
Eupatorium luciae-brauniae Eupatorium luciae-brauniae Fernald, Rhodora 44: 463. 1942.Eupatorium deltoides E. L. Braun 1940, non Jacquin 1798. 
Eupatorium aboriginum Eupatorium aboriginum Greene, Pittonia 4: 277. 1901. OKLAHOMA: Creek Co.: Sapulpa, 1 Oct 1895, Bush 1440 (holotype: ?).
Eupatorium altissimum Eupatorium altissimum (Linnaeus) Linnaeus, Syst. Veg., ed. 13. 614. 1774, non Linnaeus 1753.Ageratum altissimum Linnaeus 1753. 
Eupatorium boreale Eupatorium boreale Greene, Rhodora 3: 83. 1901.  
Eupatorium deltoides Eupatorium deltoides E. L. Braun, Rhodora 42: 50. 1940, non Jacquin 1798. KENTUCKY: Whitley Co.: Near Cumberland Falls, 6 Sep 1939, Braun 2583 (holotype: GH).
Eupatorium rugosum Eupatorium rugosum Houttuyn, Nat. Hist. 2(10): 558. 1779.Ageratum altissimum Linnaeus 1753. 
Eupatorium rugosum var. villicaule Eupatorium rugosum Houttuyn, var. villicaule (Fernald) S. F. Blake, Rhodora 43: 558. 1941.Eupatorium urticifolium Reichard, var. villicaule Fernald 1908. 
Eupatorium rugosum var. chlorolepis Eupatorium rugosum Houttuyn, var. chlorolepis Fernald, Rhodora 44: 462, t. 739. 1942. VIRGINIA: Surry Co.: Along th James River, Claremont, 5 Sep 1941, Fernald & Long 14034 (holotype: GH; isotype: PH).
Eupatorium rugosum var. tomentellum Eupatorium rugosum Houttuyn, var. tomentellum (B. L. Robinson) S. F. Blake, Rhodora 43: 557. 1941.Eupatorium urticifolium Reichard, var. tomentellum B. L. Robinson 1911. 
Eupatorium urticifolium Eupatorium urticifolium Reichard, Syst. Pl. 3: 719. 1780, nom. illegit.Eupatorium rugosum Houttuyn 1779; Ageratum altissimum Linnaeus 1753. 
Eupatorium urticifolium var. tomentellum Eupatorium urticifolium Reichard, var. tomentellum B. L. Robinson, Proc. Amer. Acad. Arts 47: 195. 1911. WISCONSIN: Dane Co.: Madison, 28 Aug 1893, Churchill s.n. (holotype: GH).
Eupatorium urticifolium var. trifolium Eupatorium urticifolium Reichard, var. trifolium Farwell, Rep. (Annual) Michigan Acad. Sci. 17: 170. 1916. MICHIGAN: Oakland Co.: Parkedale, 23 Aug 1914, Farwell 3843 (holotype: BLH).
Eupatorium urticifolium var. villicaule Eupatorium urticifoilum Reichard, var. villicaule Fernald, Rhodora 10: 87. 1908. VIRGINIA: Bedford Co.: Without locality, 1871, Curtiss s.n. (holotype: GH).
Kyrstenia aborigina Kyrstenia aborigina (Greene) Greene, Leafl. Bot. Observ. Crit. 1: 8. 1903.Eupatorium aboriginum Greene 1901. 
Kyrstenia altissima Kyrstenia altissima (Linnaeus) Greene, Leafl. Bot. Observ. Crit. 1: 8. 1903.Ageratum altissimum Linnaeus 1753. 
Kyrstenia borealis Kyrstenia borealis (Greene) Greene, Leafl. Bot. Observ. Crit. 1: 8. 1903.Eupatorium boreale Greene 1901. 
Eupatorium ageratoides Eupatorium ageratoides Linnaeus f., Suppl. Pl. 355. 1782 ("1781"), nom. illegit.Eupatorium rugosum Houttuyn 1779; Ageratum altissimum Linnaeus 1753. 

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Bibb, Blount, Butler, Calhoun, Clay, Cleburne, Colbert, Coosa, Dallas, DeKalb, Elmore, Etowah, Greene, Henry, Jackson, Jefferson, Lauderdale, Lawrence, Limestone, Lowndes, Marengo, Marshall, Monroe, Montgomery, Shelby, St. Clair, Talladega, Tallapoosa, Tuscaloosa, Walker, Wilcox, Winston

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: AMAL, AUA, JSU, SAMF, TROY, UNA, UWAL

Range of years during which specimens were collected: -

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
JSU103513 Tuscaloosa 16 Oct 1975 R. D. Whetstone
7200
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103503 Marshall 02 Oct 1992 D. D. Spaulding
3172
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
TROY000001356 Henry 03 Oct 1999 John R. MacDonald
13549
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson
TROY000045801 Lawrence 13 Sep 2013 J. Kevin England
4524
TROY
Ageratina altissima (Linnaeus) King and H.E. Robinson var. altissima
UNA00053981 Lawrence 18 Oct 1980 Robert R. Haynes
8225
UNA
Ageratina altissima (L.) King & H.E. Robins.
AUA000001199 Dallas 16 JUN 1982 GUNN, SCOTT C.
767
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
UWAL0014391 Lawrence 13 Sep 2013 England, J. Kevin
4524
UWAL
Ageratina altissima (Linnaeus) King & H. E. Robinson var. altissima
UWAL0000429 St. Clair 22 Oct 2006 Keener, Brian R.
3246
UWAL
Ageratina altissima (L.) King and H. E. Robins. var. altissima
JSU103500 Jefferson 28 Sep 1984 J. P. Barber
1164
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103497 Jackson 18 Sep 1998 K. R. Brodeur
1416
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
UNA00048697 Lowndes 3 Oct 1982 S. C. Gunn
1360
UNA
Ageratina altissima (L.) King & H.E. Robins.
JSU103495 Jackson 21 Sep 1997 D. D. Spaulding
10116
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103487 Etowah 25 Oct 1984 C. F. Nixon
1000
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AUA000001196 Coosa 11 OCT 1980 WEBB, A. L.
077
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
UNA00060516 Walker 27 Oct 1984 Charles N. Horn
610
UNA
Ageratina altissima (L.) King & H.E. Robins.
AUA000001204 Lowndes 3 OCT 1982 GUNN, SCOTT C.
1360
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
JSU103492 Jackson 14 Oct 1975 R. D. Whetstone
7507
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103507 Marshall 20 Sep 1986 R. D. Whetstone
15725
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103502 Marshall 13 Aug 1975 R. D. Whetstone
6387
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AUA000001193 Bibb 16 SEP 1976 SESSLER, ANN H.
699
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
TROY000015777 Wilcox 26 Oct 2008 Alvin R. Diamond
20370
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103501 Lawrence 06 Aug 1993 J. M. Ballard
3125
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103494 Jackson 11 Sep 1994 D. D. Spaulding
6295
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103512 Tuscaloosa 16 Oct 1975 R. D. Whetstone
7200
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103511 Talladega 29 Sep 1983 R. D. Whetstone
13776
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
TROY000045548 Lawrence 21 Jul 2012 J. Kevin England
3782
TROY
Ageratina altissima (Linnaeus) King and H.E. Robinson var. altissima
AUA000001194 Colbert 25 OCT 1980 BEARD, BEN
055
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
JSU103481 Cleburne 27 Sep 1984 P. L. Smith
s.n.
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AUA000001200 Dallas 16 JUN 1982 GUNN, SCOTT C.
767
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
AMAL00018445 Lauderdale 18 Nov 2009 Brian D. Holt
SC-245
AMAL
Ageratina altissima var. altissima (Linnaeus) King & H.E. Robinson
UWAL0031245 Greene 21 Oct 2011 Keener, Brian R.
6786
UWAL
Ageratina altissima (L.) King & H.E.Robins var. altissima
SAMF0005403 Talladega 07 Oct 2003 Davenport, L. J.
3001
SAMF
Ageratina altissima (Linnaeus) King & H. E. Robinson
JSU103491 Etowah 02 Oct 1994 L. M. Hodge
3984
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
TROY000029326 Montgomery 29 Sep 2009 Alvin R. Diamond
20951
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103504 Marshall 27 Sep 1991 D. D. Spaulding
1023
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103482 Dallas 01 Oct 1982 S. C. Gunn
1315
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103499 Jefferson 17 Oct 1975 R. D. Whetstone
7310
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
UNA00068742 St. Clair 22 Oct 2006 Brian R. Keener
3246
UNA
Ageratina altissima (L.) King & H.E. Robins. var. altissima
AUA000001195 Colbert 7 AUG 1971 STRAIT, DAN B.
146
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
JSU103483 DeKalb 06 Nov 1982 R. D. Whetstone
12997
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AUA000001192 Bibb 1 OCT 1977 SESSLER, ANN H.
1927
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
AMAL00006538 St. Clair 22 Oct 2006 Brian R. Keener
3246
AMAL
Ageratina altissima (L.) King & H.E. Robins. Var. altissima
AUA000001202 Lawrence 18 OCT 1980 HAYNES, ROBERT R.
8225
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS. var. ALTISSIMA
JSU103489 Etowah 24 Sep 1994 L. M. Hodge
3862
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AMAL00016343 Butler 21 Oct 2006 A. R. Diamond
17096
AMAL
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU136028 Blount 19 Sep 1998 Brian R. Keener
1647
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU102999 Calhoun 10 Sep 1995 S. E. Hruska
900
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
TROY000028908 St. Clair 21 Sep 2008 Brian R. Keener
4900
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson var. altissima
AUA000001201 DeKalb 30 SEP 1976 WATSON, M. F.
058
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
UNA00053569 Dallas 30 Sep 1969 Joab L. Thomas
2459
UNA
Ageratina altissima (L.) King & H.E. Robins.
JSU103484 DeKalb 20 Sep 1984 R. D. Whetstone
s.n.
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103000 Clay 09 Oct 1982 R. D. Whetstone
12740
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AUA000001206 Shelby 16 SEP 1976 SESSLER, ANN H.
667
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
SAMF0005404 Blount 02 Oct 2003 Davenport, L. J.
2985
SAMF
Ageratina altissima (Linnaeus) King & H. E. Robinson
UNA00054463 Blount 19 Sep 1998 Brian R. Keener
1647
UNA
Ageratina altissima (L.) King & H.E. Robins.
UWAL0000820 Montgomery 29 Sep 2009 Diamond, A.R.
20951
UWAL
Ageratina altissima (L.) King and H. E. Robins.
JSU103510 Shelby 11 Oct 1997 D. D. Spaulding
10221
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
TROY000039512 Elmore 29 Sep 2012 Robert Pullen
186
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103490 Etowah 20 Oct 1983 R. D. Whetstone
13802
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU102998 Calhoun 10 Sep 1995 S. E. Hruska
890
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
UNA00027819 Tuscaloosa 12 Oct 1881 Charles Mohr
s.n.
UNA
Ageratina altissima (L.) King & H.E. Robins.
AUA000001207 Tallapoosa 4 OCT 1997 TYLER, PATRICIA J.
TYLER166
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
JSU103485 DeKalb 06 Nov 1982 R. D. Whetstone
12997
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AUA000001205 Shelby 16 SEP 1976 SESSLER, ANN H.
649
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
TROY000048019 Lawrence 02 Oct 1993 Fennel Blythe
28
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson
UWAL0014609 Lawrence 21 Jul 2012 England, J. Kevin
3782
UWAL
Ageratina altissima (Linnaeus) King & H.E. Robinson var. altissima
AMAL00017312 Jackson 26 Aug 2009 T. Wayne Barger
HC-331
AMAL
Ageratina altissima (Linnaeus) King & H.E. Robinson var. altissima
JSU103506 Marshall 11 Oct 1991 D. D. Spaulding
1060
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AMAL00002971 Henry 03 Oct 1999 John R. MacDonald
13549
AMAL
Ageratina altissima (L.) King & H.E. Robins. Var. altissima
UWAL0010325 Marengo 01 Oct 2011 England, J. Kevin
3188
UWAL
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103508 Monroe 14 Oct 1982 R. D. Whetstone
12795
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AUA000001197 Coosa 10 SEP 1975 RUTLAND, DAVID W.
1363
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
JSU102997 Calhoun 25 Sep 1986 C. L. Lawler
1255
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AUA000001198 Dallas 1 OCT 1982 GUNN, SCOTT C.
1332
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
UWAL0011505 Butler 03 Oct 2012 Diamond, Alvin R.
23465
UWAL
Ageratina altissima (Linnaeus) King & H.E. Robinson
UWAL0000428 St. Clair 21 Sep 2008 Keener, Brian R.
4900
UWAL
Ageratina altissima (L.) King and H. E. Robins. var. altissima
JSU103498 Jefferson 28 Sep 1984 J. P. Barber
1141
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103496 Jackson 18 Sep 1998 K. R. Brodeur
1416
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
TROY000035649 Butler 03 Oct 2012 Alvin R. Diamond
23465
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103514 Winston 17 Sep 1994 D. D. Spaulding
6371
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AMAL00000612 Marengo 01 Oct 2008 J. Kevin England
1270
AMAL
Ageratina altissima (L.) King & H.E. Robins.
TROY000014558 Monroe 04 Oct 2007 Alvin R. Diamond
18446
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103486 Etowah 25 Oct 1984 C. F. Nixon
1000
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
TROY000015799 Butler 11 Oct 2008 Alvin R. Diamond
20269
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103509 Monroe 14 Oct 1982 R. D. Whetstone
12795
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
AUA000001203 Lawrence 11 AUG 1981 O'HALLORAN, K.
374
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
AUA_ACC039618 Limestone 20 SEP 1983 FLEISCHER, S. J.
AUA
AGERATINA ALTISSIMA (L.) KING & H.E. ROBINS.
TROY000017360 St. Clair 22 Oct 2006 Brian R. Keener
3246
TROY
Ageratina altissima (Linnaeus) King & H.E. Robinson var. altissima
UWAL0015301 St. Clair 28 Oct 2007 Keener, Brian R.
3990
UWAL
Ageratina altissima (L.) King & H.E. Robins. var. altissima
JSU103493 Jackson 24 Oct 1992 J. M. Ballard
787
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103488 Etowah 05 Oct 1973 K. E. Landers
s.n.
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
JSU103505 Marshall 13 Sep 1991 D. D. Spaulding
920
JSU
Ageratina altissima (Linnaeus) King & H.E. Robinson
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