Journal
PLANT BIOSYSTEMS
Volume 148, Issue 5, Pages 1035-1039Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/11263504.2013.850119
Keywords
Conyza sumatrensis; Asteraceae; Pakistan; Potohar region; capitula structure
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Conyza sumatrensis (Retz.) E. H. Walker (Astereae: Asteraceae) has been recorded in Pakistan for the first time. The species is closely associated with C. bonariensis and C. canadensis. It differs from C. bonariensis in its smaller capitula with a small series of marginal and disc florets that lack a purplish-pink apex, but resembles it in disciform capitula. C. sumatrensis differs from C. canadensis in having five-lobed disc florets and lacking well-developed ray florets. The species is widely distributed in the Potohar region, particularly in Rawalpindi and Islamabad.
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