Delaware Wildflowers • Scientific names
Helianthus giganteus
Tall SunflowerAsteraceae — Aster family
Native
Nottingham County Park (PA)
September 2006
Stroud Preserve (PA)
September 2013
Guide to Helianthus of Delaware
Search Google • Delaware • USDA
Photos copyright David G. Smith
Information from the Delaware Flora Checklist used with author's permission.