Helianthus giganteus L.

2. Z
The New York Botanical Garden
Plants of U.S. A.
Asteraceae Helianthus giganteus L.
det. M. Nee, 2008
Wisconsin, Richland Co., 3 miles SE of Richland Center.
T 10 N; R 1 E; NWVft NElA sect. 35.
43°18’17”N, 90°20’26”W. alt. 210 m.
Showy, to 2.2 m. tall, some plants shorter, in loose colonies.
With Heracleum lanatum, Pteridium aquilinum, Corylus
americana, Phalaris arundinacea, Vemonia fasciculata in
lowland between old railroad (now bike trail) and cornfield,
but not generally flooded by Pine River from adjacent
floodplain. Roots horizontal, somewhat thickened. Rays
bright yellow; disc slightly darker yellow-orange.
Coll.: M. Nee 55944
26 Aug. 2008
02891313