Swamp Jack-in-the-pulpit
Arisaema triphyllum subsp. triphyllumAraceae — Arum family
Native

Middle Run Valley Natural Area
May 2001

White Clay Creek State Park -- Thompson Station Road
September 2005

White Clay Creek State Park -- Thompson Station Road
April 2014

Pistillate flowers
Middle Run Valley Natural AreaMay 2014

Staminate flowers
White Clay Creek State Park -- Possum HillMay 2014

The other plant is stiltgrass, an invasive non-native.
White Clay Creek State Park -- Judge Morris EstateSeptember 2014

White Clay Creek State Park -- Possum Hill
September 2017

White Clay Creek State Park -- Thompson Station Road
September 2019
Guide to Arisaema of Delaware
Search Google • Delaware • USDA
Photos copyright David G. Smith
Information from the Delaware Flora Checklist used with author's permission.