Xanthium strumarium var. glabratum (DC.) Cronquist
Asteraceae
Jim Vanderhorst
6789
2003-09-27
27-Sep-03
United States, West Virginia, Summers, Bluestone National Scenic River. Ca. 3.9 air miles SW from the mouth of the Little Bluestone. Along the river beneath the tramway.
472 meters
1550ft
Gently sloping, intermittently flooded, cobble zone