Open Access Research Paper Views (369) Download (9) Effect of seed position on parental plant on seed germination and seedling growth of common cocklebur (Xanthium strumarium L.) Rouhollah Amini, Sahar Izadkhah J. Bio. Env. Sci.3( 10), 123-129, October 2013. Key: Common cocklebur (Xanthium strumarium L.)Germination percentageGermination rateHeteroblasty Details