Argemone mexicana

Scientific nameArgemone mexicana
English: Mexican poppy, Mexican thistle, prickly poppy
Indonesia: druju, celangkringan
Malaysia: chelang keriugan, pokok popi
Myanmar: kye-ja
Philippines: kachumba, kasubang-aso, diluariu
Thailand: fin naam
Viet Nam: cà dai hoa vàng, gai cua, mùi cua
Annual, very spiny herb (up to 0.9 m high); stems exude a yellow sap when cut.
Leaves: Grey or bluish-green, with prominent white veins and yellowmidvein (5–22 cm long and 3–7 cm wide), deep lobed with sharp spines; leaves of A. ochroleuca Sweet. are a darker shade of green.
Flowers: Bright yellow (2.5–5 cm across) as opposed to pale yellow or creamy white in A. ochroleuca.
Fruits: Capsules (dry fruits that open at maturity), spiny, green turning brown as they mature, egg-shaped (2.5–4 cm long), splitting into 3–6 lobes releasing small black seeds (1.5 mm across).
Belize, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, El Salvador, Florida (USA), Guatemala, Guyana, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Uruguay and Venezuela and the Caribbean.
Accidentally as a contaminant.
Roadsides, railway lines, disturbed land, wasteland, urban open space, fallow land, crops, managed pasture, riparian areas, gullies and dry river courses.
Reduces plant diversity and has an inhibitory effect on the germination and seedling growth of vegetables (Hazarika and Sannigrahi, 2001). Weed residues may also affect the growth and development of bambara
groundnut and sorghum (Karikari et al., 2000). Ingestion of seeds by poultry can result in death, and grazing animals can be poisoned if the seeds are consumed in hay or chaff. Harvesting of crops in the presence
of this weed can also result in injuries. Edible vegetable oil, either accidentally contaminated with A. mexicana, or intentionally adulterated by unscrupulous traders, has resulted in epidemic dropsy in India. An
epidemic also occurred in South Africa following the contamination of wheat flour (Sharma et al., 1999). A. mexicana has been identified as an important allergen in India (Singh and Kumar, 2004).
Witt, Arne. 2017. Guide to the Naturalized and Invasive Plants of Southeast Asia. CAB International. Retrieved from on 8 October 2018
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Last updated on 02/13/2019 19:57