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to efloraofindia
Sharing Ambrosia psilostachya photographed from Brampton Canada on 2-11-2022. Earlier I had shared A. artemisiifolia from Mississauga Canada. The two differ as under:
A. artemisiifolia: Plants annual, erect, leaves 1-2-pinnately lobed, petioles 2.5-6 cm long.
A. psilostachya: Plants perennial, leaves 1-pinnately lobed, petioles shorter than 2.5 cm
Dr. Gurcharan Singh
Retired Associate Professor SGTB Khalsa College, University of Delhi, Delhi-110007 Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.