Locality: United States, Colorado, Jefferson, Tin Cup Ridge. In shrubby vegetation along the top of Tin Cup Ridge, the northward extension of Dakota Ridge into Golden, 4.58 km south southeast of the GNIS location of Golden.
39.71596484 -105.2065618 WGS 1984.
Elevation: 1905 meters (6248ft)
East across US Highway 40 from the Peabody Museum dig at Magic Mountain, which was collected by E. H. Brunquist (1959).; Perennial herb, to 60 cm.; Leaves, basal and cauline, some densely tomentose along petiole and mid-vein, else thinly tomentose, basal petiole 60 mm. + blade ovate 110 mm. x 35 mm. wide, margin entire to slightly scalloped (somewhat more like that described for P. crocata), cauline, sessile, lance-linear, 130 mm. x 15 mm. wide, reduced above, margins, some with small, dense, sharp teeth; Inflorescence, ±8 heads per stem; Phyllaries in 1 series, (partially enclosing alternate ray and disc flowers), 6 mm. x 1.7 mm. wide, tips mucronate; Receptacles epaleate; Pappus of bristles in ±1+ series, 6-7 mm.; Ray flowers, few (8-12), female only, tube 4 mm. + blade 8 mm. = 12 mm. X 3 mm. wide; Disc flowers bisexual.