United States, Colorado, Boulder, Area: Van Vleet field; OSProperty: Van Vleet; South of S. Boulder Rd. and west of S. Boulder Creek.
39.98427 -105.22397 +-250m. WGS84
T1S R70W sec 9 NE¼ of NE¼
I placed the point near the center of the NE 1/4 of the NE 1/4 of section 9; west of Boulder Creek and south of South Boulder Road. RA; Geocoded 2/1/2019
1615 meters
5300 ft.
Raised dry area of irrigated hayfield.
Flowers yellow.
Flower
Common Name: Sulphur Flower; Determine subspecies. Weber 1996 says this species is composed of two "rather distinct races": var. umbellatum and var. aureum (including var. porteri), the latter "more common in the upper altitudes."