Centromadia fitchii

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Hemizonia fitchii.jpeg

|image_caption =

|genus = Centromadia

|species = fitchii

|authority = (A.Gray) Greene

|synonyms_ref = [http://www.theplantlist.org/tpl1.1/record/gcc-141100 The Plant List, Centromadia fitchii (A.Gray) Greene ]

|synonyms = Hemizonia fitchii A.Gray

}}

Centromadia fitchii, common name Fitch's spikeweed{{BSBI 2007 |accessdate=2014-10-17 }} or Fitch's tarweed,{{PLANTS|id=HEFI|taxon=Hemizonia fitchii|accessdate=5 June 2015}} is a species of North American plants in the tribe Madieae within the family Asteraceae. It is native to California and southwestern Oregon.[http://bonap.net/MapGallery/County/Centromadia%20fitchii.png Biota of North America Program 2014 county distribution map][http://www.calflora.org/cgi-bin/species_query.cgi?where-taxon=Centromadia+fitchii Calflora taxon report, University of California, Centromadia fitchii (A.Gray) Greene, Spikeweed]

Centromadia fitchii is an herb up to 50 cm (20 inches) tall. It produces arrays of numerous yellow flower heads with both ray florets and disc florets.[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066302 Flora of North America, Spikeweed, Centromadia Greene][https://www.biodiversitylibrary.org/page/38425703#page/219/mode/1up Greene, Edward Lee 1894. Manual of the Botany of the Region of San Francisco Bay 197][https://www.biodiversitylibrary.org/page/32405401#page/142/mode/1up Gray, Asa 1857. Reports of explorations and surveys: to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean, made under the direction of the Secretary of War 4: 109] as Hemizonia fitchii