]> NEBC barcode-01023642 United States of America Massachusetts Ayer, along NW branch Ry [Peterborough & Shirley Railroad] Pseudognaphalium obtusifolium (Linnaeus) Hilliard & B. L. Burtt (Linnaeus) Hilliard & B. L. Burtt 2020-11-19 09:09:47 D. L. Ordway & C. Bullard