Ageratina altissima (L.) King & H.E.Robinson var. altissima
white snakeroot
white snakeroot
September 14,
Middlesex Fells Reservation, Medford
White snakeroot is a stately poisonous plant with large, coarsely serrate, nettle-like leaves (its other name is Eupatorium urticifolium ). Its habit speaks about its favorite habitat: shady woods.