by Stephen Mifsud
   12 Jun 2024      ()
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Chenopodium ambrosioides   (Mexican Tea)

Chenopodium ambrosioides  (AMARANTHACEAE.) 
Images for this profile are taken from the Maltese Islands after year 2000.

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Profile Date Nov-2007 (taxon update: none)
Citation for this page Mifsud, S. (2022). Chenopodium ambrosioides - datasheet created on Nov-2007. Retrieved from on 12-Jun-2024

Nomenclature and Basic Information

Species name :

Chenopodium ambrosioidesL.
Published in Sp. Pl. 219 (1753)

Synonyms :
(basionym or principal syn.)

Dysphania ambrosioides (L.) Mosyakin & Clemants
Full list of synonyms : [Euro+Med] [PlantList] [IPNI] [POWO] [Catalogue of Life] []

Plant Family :

Amaranthaceae Juss. (The Amaranth Family)
42 species from the Amaranthaceae family are recorded from the Maltese Islands.

English name(s) :

Mexican Tea, Wormseed

Maltese name(s) :

Għobbejra Tfuħ Te' Falz

Status for Malta :

Naturalised Alien. Species that was introduced in Malta after year 1492 (Columbus' discovery of the New World) and spreads and integrates to form established, non-invasive populations. Species may become become invasive if it widespreads rapidly.

Frequency :

Very Common     Common    Frequent     Scarce     Rare    Very rare    Extinct

Growth form :

Raunkiaer lifeform [info]: THEROPHYTE ( annual plants, herbaceous )
Germination [info]: Dicotyledon

Legal Protection :

Not legally protected till the last update of this website (2/Mar/2022)

Red List (1989) :

Not listed in the Red Data Book of the Maltese Islands

Flowering Time :

April – November

Colour of Flowers:



Mildy toxic, can cause adverse conditions if consumed in large quantities

Name Derivation :


Planting in rural areas :

Can be planted in rural areas according to ERA Guidelines

Description, Habitat and Distribution
Habitat in Europe: Data will be available in the next update of this website.
Preferred habitat in Malta: Unflooded areas in rocky valleys beds and watercourses
Botanical Description: Annual, rarely short-lived perennial, up to 1.2 m, strongly aromatic, pubescent (rarely with longer hairs), with many sessile glands. Leaves usually lanceolate, entire, dentate or rarely laciniate. Inflorescence paniculate; cymes sessile along the ultimate branches, usually bracteate. Calyx not saccate or net-veined; sepals free in at least upper ½ rounded dorsally. Seeds 0.5-0.8 mm in diameter.
Chromosome number: 2n=32
Distributional range: Cultivated as a vermifuge, and naturalized throughout much of W., C. & S. Europe
Native region outside Europe: (Tropical America.)

Distributional map in Europe
and the Mediterranean region (2018):
Occurrences in Europe.
(from Flora Europaea pre year 1993):
Introduced in Albania, Austria and Liechtenstein, the Azores, Belgium, the Balaeric Islands, Corse, Crete, France (incl. Monaco and Channel Islands but excluding Corse), Germany, Greece, Spain (incl. Andorra but excl. the Balaerics), Hungary, Italy (excl. Sicily and Sardignia), ex-Jugoslavia, Portugal, Poland, Romania, Russia and former USSR, Sardinia, Sicily and/or Malta
Occurrences in Europe and the Mediterranean region.
(from Euro+Med Checklist, 2019)
  Country codes  
?Ca(P) Md(M P) [Ab(A) nAE nAg nAl cAu Au(A) nAz(C F G J L M P S T) nBe(B) nBl(I M N) nBr Bu Ca(C F G L T) nCa(H) Cg nCo nCr nCt aDa nEg aEs aFe nGa(F) nGe Gg nGr -Hb(E) nHo Hs(G) nHs(S) nHu nIJ nIr nIt nJo nJu nLe nLi nLS cLt nLu nMa Mk nMo aNo nPo aRf(C) Rf(CS K) nRm nSa nSi(M S) nSk Sl nSn nSr aSu Sy nTn Tu(A) Uk(K) nUk(U)]

Links & Further literature (0 papers)

Google Web

Google Images

Google Scholar

Research Gate




Med Checklist

Cat. of Life



World Flora Online

Plants of the World Online

Vienna Virt. Herb.

RBGE Herbarium

KEW Herbarium




Kindly Email if there are papers and publications about local studies or information about this species to be included in the list above.

Species Images (6 images)
   Chenopodium ambrosioides   -   Image Code: CHNMB-0.
   Chenopodium ambrosioides   -   Image Code: CHNMB-1.
   Chenopodium ambrosioides   -   Image Code: CHNMB-2.
   Chenopodium ambrosioides   -   Image Code: CHNMB-3.
   Chenopodium ambrosioides   -   Image Code: CHNMB-4.
   Chenopodium ambrosioides   -   Image Code: CHNMB-5.

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