Voucher information | population biology | Herbaceous annual or biennial to 35 cm, rigid hairs with hooked branches at tip; sap slightly milky (seen mostly at base of phyllaries); Leaves basal and cauline, alternate, 11 cm x 18 mm wide, oblanceolate, slightly glandular, margins entire, not spine-tipped; Involucre 14 mm; Phyllaries in 4-5 series, the outer series are wide and stand away from the rest, the inner series are narrow, appendages at tip; Receptacle epaulette; Flowers all rays; Pappus of well developed bristles, equal, broader at base, plumose; Corolla yellow, readily withering; Fruit 3 mm x 0.5 mm wide, brown, annular ridges or decoration giving the appearance of a small insect pupa. | other label numbers | ad2ac32d-664a-4e35-9c7a-b10c44e932c3 | verbatim coordinates | 37.779, -122.2714 | |