OBI - Robert F. Hoover Herbarium, Cal Poly State University (OBI)
OBI186031
da62f2c3-3800-494e-85e3-c66fdc56cdf0
Lactuca serriola L
Asteraceae
Prickly Lettuce
Tom Schweich
2200
2019-08-27
27-Aug-19
United States, Colorado, Jefferson, High plains above Rocky Flats, 19.4 km. north northwest of the GNIS location of Golden, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 0.9 mi. north on Plainview Road, then 150 m. west into open prairie.
39.88552856 -105.2634864 WGS 1984
1958 meters (6422ft)
Stem prickly below, achenes with multiple nerves.
Dense colony of small plants in dried wetland, with Iris missouriensis and Epilobium sp..