Chenopodium ambrosioides L.

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Photo: Bart Wursten
Marydale Point Lake Chivero Recreational Park

Photo: Bart Wursten
Pokoteke Gorge, near Masvingo

Photo: Bart Wursten
Picnic site at dam, Umguza Recreational Park, Bulawayo

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Synonyms:
Common names:	Wormseed (English)
Frequency:
Status:	Introduced?
Description:	Erect much branched, aromatic annual herb, rarely a short-lived perennial, up to 180 cm high. Stems green, rarely tinged red. Leaves mostly lanceolate, 3-14 cm long, green, with numerous yellow glands, especially below; margin, particularly of the lower leaves, with up to 10 irregular teeth. Minute flowers in sessile yellowish clusters or 'glomerules' along the ultimate branches, together forming large branched heads.
Notes:
Derivation of specific name:	ambrosioides: resembling a species of Ambrosia, a genus in Asteraceae.
Habitat:	As a weed of cultivated or disturbed areas, gardens and waste places, usually near rivers on sandy soil.
Altitude range:	Up to 1700 m
Flowering time:
Worldwide distribution:	Throughout the tropical and subtropical regions of the world, particularly in South America
Malawi distribution:	N,C,S
Growth form(s):
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters:	Display spot characters for this species
Literature:	Brenan, J.P.M. (1988). Chenopodiaceae Flora Zambesiaca 9(1) Pages 140 - 142. Chapano, C. & Mamuto, M. (2003). Plants of the Chimanimani District National Herbarium and Botanic Garden, Zimbabwe Page 13. Chapano, C. & Mugarisanwa, N.H. (2003). Plants of the Matobo District National Herbarium and Botanic Garden, Zimbabwe Page 8. Da Silva, M.C., Izidine, S. & Amude, A.B. (2004). A preliminary checklist of the vascular plants of Mozambique. Southern African Botanical Diversity Network Report No. 30 Sabonet, Pretoria Page 148. Kirby, G. (2013). Wild Flowers of Southeast Botswana Struik Nature, Cape Town South Africa Page 348. (Includes a picture). Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 35. Phiri, P.S.M. (2005). A Checklist of Zambian Vascular Plants Southern African Botanical Diversity Network Report No. 32 Page 40. Pooley, E. (1998). A Field Guide to the Wild Flowers of KwaZulu-Natal and the Eastern Region. Natal Flora Publications Trust. Durban. Pages 526 - 527. (Includes a picture). Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Sabonet Report no. 37. Sabonet, Pretoria and Gaborone Page 46. Wild, H. (1955). Common Rhodesian Weeds Government of Rhodesia, Salisbury Page 21. (Includes a picture).

Other sources of information about Chenopodium ambrosioides:

Our websites:

Flora of Botswana: Chenopodium ambrosioides
Flora of Mozambique: Chenopodium ambrosioides
Flora of Zambia: Chenopodium ambrosioides
Flora of Zimbabwe: Chenopodium ambrosioides

External websites:

African Plants: A Photo Guide (Senckenberg): Chenopodium ambrosioides
African Plant Database: Chenopodium ambrosioides
BHL (Biodiversity Heritage Library): Chenopodium ambrosioides
EOL (Encyclopedia of Life): Chenopodium ambrosioides
GBIF (Global Biodiversity Information Facility): Chenopodium ambrosioides
Google: Web - Images - Scholar
iNaturalist: Chenopodium ambrosioides
IPNI (International Plant Names Index): Chenopodium ambrosioides
JSTOR Plant Science: Chenopodium ambrosioides
Mansfeld World Database of Agricultural and Horticultural Crops: Chenopodium ambrosioides
Plants of the World Online: Chenopodium ambrosioides
Tropicos: Chenopodium ambrosioides
Wikipedia: Chenopodium ambrosioides