Psyllium seed husks are portions of the seeds of the plant Plantago ovata, a native of India and Pakistan. (amazon.com)
Her work includes analysis of pond sediments, soils, and more collecting to document plant diversity... We're also hoping to cast a broader net across Providence with an analysis of historical specimens of Plantago [plantain] in an attempt to match terrestrial trends in heavy metal concentration with measurements taken from nearby marine sediments in Narragansett Bay [south of Providence].» (sciencedaily.com)
C. Michael Hogan marked the classification from «Species 2000 & ITIS Catalogue of Life: April 2013» as preferred for «Plantago major L.». (eol.org)