Locality: United States, Colorado, Jefferson, Native and Naturalized Flora of the Golden Area, Jefferson County, Colorado. Dakota Ridge. Northwestern-most Golden, in the pit of a former clay mine, accessed by way of the City of Golden Cressman Gulch Trail and then a social/game trail, 4.19 km. north northeast of the GNIS location of Golden.
39.78206059 -105.2361102 WGS 1984
Verbatim Coordinates: 39.78206059, -105.2361102
Elevation: 1855 meters (6084ft)
Associated Taxa: Also collected here: Chenopodium album and Physalis longifolia.
D. laciniatus is more common in Golden than D. fullonum, both of which are Colorado Noxious Weed List B weeds.