Xanthium spinosum invasive in Kashmir

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Gurcharan Singh

Aug 13, 2011, 3:12:22 AM8/13/11
to efloraofindia, Flowers of India, Tabish
Xanthium spinosum L., Sp. pl. 2:987. 1753
syn: Xanthium ambrosioides Hooker & Arnott

Common names: Bathurst-bur, prickly burweed, spiny cocklebur 

A South American plant having become invasive in many parts of Old World. Perhaps a recent introduction in Kashmir, where it has become common along roadsides and waste places.

Annual plant, up to 1 m tall, often much branched; nodes with spines in pairs, simple or 2-3 partite, 1.5-4 cm long; leaves ovate or ovate-lanceolate, 4-8 cm long, up to 5 cm broad, often 3-7-lobed, shining green on upper surface, gray or white beneath; heads globose, in racemes, lower usually pistillate, upper functionally male; burs enclosing cypselae, prickly, 10-15 mm long.

Photographed from Balgarden (July) and Harwan (August) in Kashmir. I had photographed it last year also but then it was in vegetative state. Was able to get flowers and fruits this year.

Dr. Gurcharan Singh
Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297  Mob: 9810359089


Balkar Arya

Aug 13, 2011, 3:19:27 AM8/13/11
to Gurcharan Singh, efloraofindia, Flowers of India, Tabish
New to me have seen only Xanthium strumarium. Thanks for sharing

Dr Balkar Singh
Head, Deptt. of Botany and Biotechnology
Arya P G College, Panipat
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