Dysphania ambrosioides (L.) Mosyakin & Clemants

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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:	Chenopodium ambrosioides L.
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.
Flowering time:
Worldwide distribution:	Throughout the tropical and subtropical regions of the world, particularly in South America
Botswana distribution:	N,SW,SE
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 Dysphania ambrosioides:

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Flora of Burundi: Dysphania ambrosioides
Flora of Malawi: Dysphania ambrosioides
Flora of Mozambique: Dysphania ambrosioides
Flora of Zambia: Dysphania ambrosioides
Flora of Zimbabwe: Dysphania ambrosioides

External websites:

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