Ageratum conyzoides

Species:Ageratum conyzoides L.
Plant Notes:The leaf blades have yellow punctate glands abaxially, and are apparently rarely ever eglandular, while the peduncles and phyllaries are without stipitate glands (Johnson 1971).
Status:Not Native, FACU (NWPL)
Specimen: View details of USF Herbarium specimens

** Not applicable or data not available.


Sub Class
Genus Ageratum
Species Ageratum conyzoides L. - TROPICAL WHITEWEED


Citation AGERATUM CONYZOIDES Linnaeus, Sp. Pl. 839. 1753, nom. cons.
Basionym: **
Type: Without data (holotype: Hermann, Parad. Bat. 161, ic. 1698), typ. cons.

** Not applicable or data not available.


CountyHerbariaLiterature Citation (If Applicable)
Alachua PIHG  
Brevard FLAS  
Broward USF  
Citrus PIHG  
Clay PIHG  
Collier FTG  
Gadsden FSU  
Glades PIHG  
Hardee USF  
Hendry FLAS  
Indian River FLAS  
Lee FLAS  
Leon FSU  
Martin FLAS  
Miami-Dade USF  
Palm Beach USF  
Pasco PIHG  
Seminole USF  
St. Johns FLAS  
St. Lucie FLAS  
Volusia PIHG  


– Denotes synonyms that are applicable to the state. Show these synonyms only

SynonymFull CitationBasionymType
Ageratum hirtum Ageratum hirtum Lamarck, Encycl. 1: 54. 1783, nom. illegit.BASIONYM: Ageratum conyzoides Linnaeus 1753. 
Ageratum humile Ageratum humile Salisbury, Prodr. Stirp. Chap. Allerton 188. 1796, nom. illegit.BASIONYM: Ageratum conyzoides Linnaeus 1753. 
Ageratum odoratum Ageratum odoratum Vilmorin, Fl. Pleine Terre, ed. 2. 42. 1866, nom. illegit.BASIONYM: Ageratum conyzoides Linnaeus 1753. 
Carelia conyzoides Carelia conyzoides (Linnaeus) Kuntze, Revis. Gen. Pl. 1: 325. 1891.BASIONYM: Ageratum conyzoides Linnaeus 1753. 
Eupatorium conyzoides Eupatorium conyzoides (Linnaeus) E. H. L. Krause, in Sturm, Deutschl. Fl., ed. 2. 13: 32. 1905, non Miller 1768, nec Vahl 1794.BASIONYM: Ageratum conyzoides Linnaeus 1753. 
Ageratum album Ageratum album Hornemann, Hort. Bot. Hafn. 792. 1815.  
Ageratum arsenei Ageratum arsenei B. L. Robinson, Contr. Gray Herb. 64: 3. 1922. TYPE: MEXICO: Nuevo Leon: Cercado near Monterrey, 12 Nov 1911, Arsène s.n. (hholotype: K; isotype: GH fragm).
Ageratum ciliare Ageratum ciliare Linnaeus, Sp. Pl. 839. 1753. TYPE: INDIA: Without data (lectotype: Plukenet, Phytographia t. 81(4). 1691). Lectotypified by H. Robinson, in C. E. Jarvis & Turland, Taxon 47: 351. 1998.
Ageratum conyzoides forma album Ageratum conyzoides Linnaeus, forma album B. L. Robinson, Proc. Amer. Acad. Arts, ser. 2. 49: 462. 1913. TYPE: PUERTO RICO: Cacoa, s.d., Sintenis 5874 (holotype: US).
Ageratum conyzoides var. hirtum Ageratum conyzoides Linnaeus, var. hirtum de Candolle, Prodr. 5: 108. 1836.BASIONYM: Ageratum hirsutum Lamarck ex Poiret 1810. 
Ageratum conyzoides var. inaequipaleaceum Ageratum conyzoides Linnaeus, var. inaequipaleaceum Hieronymus, Bot. Jahrb. Syst. 19: 44. 1895. TYPE: COLOMBIA: Cauca: Near Popayan, s.d., Lehmann 4666 (holotype: B?; isotypes: GH, NY).
Ageratum cordifolium Ageratum cordifolium Roxburgh, Fl. India, ed. 1832. 3: 415. 1832. TYPE: INDIA: West Bengal: Vicinity of Calcutta,
Ageratum hirsutum Ageratum hirsutum Lamarck ex Poiret, Encycl., Suppl. 1: 242. 1810.  
Ageratum nanum Ageratum nanum Schultz Bipontinus, in K. Koch & Fintelmann, Wochenschr. Gaertnerei Pflanzenk. 1(Gart.-Nachr.): 26. 1858.  
Ageratum suffruticosum Ageratum suffruticosum Regel, Gartenflora 3: 389, t. 108. 1854. TYPE: MEXICO: Cult. in Germany, without data (lectotype: Regel, Gartenflora 3: t. 108. 1854). Lectotypified by M. F. Johnson, Ann. Missouri Bot. Gard. 58: 27. 1971.
Cacalia mentrasto Cacalia mentrasto Vellozo, Fl. Flumin. 339. 1829 ("1825"). TYPE: BRAZIL: Rio de Janeiro: Rio de Janeiro, without data (lectotype: Vellozo, Fl. Flumin., Icon. 8: t. 69. 1831 ("1827")). Lectotypified by M. F. Johnson, Ann. Missouri Bot. Gard. 58: 26. 1971.
Carelia conyzoides var. pusilla Carelia conyzoides (Linnaeus) Kuntze, var. pusilla Kuntze, Revis. Gen. Pl. 1: 325. 1891. TYPE: VIETNAM:
Carelia conyzoides var. robusta Carelia conyzoides (Linnaeus) Kuntze, var. robusta Kuntze, Revis. Gen. Pl. 1: 325. 1891.  
Carelia conyzoides var. umbrosa Carelia conyzoides (Linnaeus) Kuntze, var. umbrosa Kuntze, Revis. Gen. Pl. 1: 325. 1891.  


Country State County Date Specimen Notes Image
USA Florida Miami-Dade Co. 21 Oct 1985 B. F. Hansen 10725
USA Florida Palm Beach Co. 05 Mar 1999 K. A. Bradley 1978
USA Florida Broward Co. 15 May 1981 J. Popenoe 1983
USA Florida Monroe Co. 30 May 1947 R. B. Ledin 1290 CULTIVATED.
USA Florida Pinellas Co. 06 Jul 1970 D. Burch 6842 CULTIVATED.
Cuba Cumanayagua Mun. 10 May 1956 F. A. Turnau 79
Jamaica Surrey Co. St. Thomas Par. 23 Jan 1952 G. R. Proctor 6211
Bahamas Inagua Island 25 Feb 1909 Worthington s.n.
Puerto Rico Luquillo Mun. 21 Apr 1985 R. P. Sauleda 8861
Dominican Republic Peravia Prov. 25 Dec 1981 T. A. Zanoni 18775
Dominican Republic Santiago Prov. 29 Apr 1970 D. Burch 2519
Puerto Rico Rio Grande Mun. 02 Dec 1981 B. F. Hansen 9573
USA Florida Hardee Co. 16 Aug 2017 M. Horrigan s.n.
USA Florida Seminole Co. 05 Mar 2016 W. K. Taylor s.n.
Venezuela Aragua 06 Oct 1971 R. W. Long 3533
Brazil Amazonas Manaus Mun. 30 May 1971 P. J. M. Maas 319
Panama Bocas del Toro Prov. 19 Apr 1969 R. L. Lazor 2587
Nicaragua Carazo Dept. 12 Dec 1968 R. B. Hamblett 536
Honduras Francisco Morazán Dept. 16 Mar 1985 T. Garcia 144
Brazil Paraná Antonina Mun. 28 Aug 1983 G. Hatschbach 46819
Honduras Francisco Morazán Dept. 28 Apr 1984 Y. Calderón 147
Honduras Francisco Morazán Dept. 17 Mar 1984 L. Morales R. 168
Venezuela Miranda 10 Jan 1969 J. v. Rooden 149
Panama Panamá Prov. 11 Jan 1972 E. L. Tyson 6507
Honduras Francisco Morazán Dept. 09 Apr 1985 S. Avila 129
Suriname Paramaribo Distr. 20 Sep 1961 W. H. A. Hekking 922
USA Florida Charlotte Co. 15 Mar 1931 M. Mulvania s.n. CULTIVATED
USA Florida Lee Co. 10 Jan 2021 S. H. Brown s.n.
USA Florida Miami-Dade Co. 27 Jun 2019 C. Marble s.n.
USA Florida Seminole Co. 12 Dec 2022 D. Rockwood s.n.
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