Arum (Araceae) family
Jack-in-the-pulpit (Arisaema triphyllum) -- in April -- Saluda, NC green & brown NC-W
duckweed (Lemna minor) -- in June -- Red Mountain Open Space, Larimer County Parks and Open Lands, CO green & brown CO-F
duckweed (Lemna minor) -- in August -- Tanglewood, Fort Collins Natural Area, CO
American skunkcabbage (Lysichiton americanus) -- in April -- Columbia Gorge, OR yellow & orange OR-N