Helianthus pauciflorus subsp. subrhomboideus (Rydb.) O. Spring & E. E. Schill.
Asteraceae
Tom Schweich
1267
2015-07-29
7/29/2015
United States of America, Colorado, Jefferson, Golden, Ranson/Edwards Homestead Open Space Park, High plains above Rocky Flats, 15.8 km north northeast of Golden, 1.4 miles north of CO State Highway 72 on Plainview Road, 194 m. northeast of Plainview Road.
39.89229997 -105.2599619 WGS84
1942 meters (6370ft)
Tall sunflowers with opposite leaves, same as Coll. No. 1260.