Gutierrezia

{{Short description|Genus of flowering plants}} {{Automatic taxobox | image = Gutierreziasarothrae.jpg | image_caption = ''Gutierrezia sarothrae'' | display_parents = 3 | taxon = Gutierrezia | authority = Lag. | synonyms_ref = <ref name=r>{{Cite web |url=http://dixon.iplantcollaborative.org/CompositaeWeb/default.aspx?Page=NameDetails&TabNum=0&NameId=a46e0924-5a4d-4c6f-b870-59930118154d |title=Flann, C (ed) 2009+ Global Compositae Checklist |access-date=2014-12-01 |archive-url=https://archive.today/20141201215155/http://dixon.iplantcollaborative.org/CompositaeWeb/default.aspx?Page=NameDetails&TabNum=0&NameId=a46e0924-5a4d-4c6f-b870-59930118154d |archive-date=2014-12-01 |url-status=dead }}</ref> | synonyms = * ''Brachyris'' Nutt. * ''Brachyachyris'' Spreng. * ''Greenella'' A.Gray * ''Odontocarpha'' Poepp. ex DC. * ''Hemiachyris'' DC. | type_species = ''Gutierrezia linearifolia'' Lag.<ref name="Tropicos, Gutierrezia Lag">[http://www.tropicos.org/Name/40018457 Tropicos, ''Gutierrezia'' Lag.]</ref> (syn of ''G. sarothrae)''<ref>[http://www.theplantlist.org/tpl1.1/record/gcc-116100 The Plant List, ''Gutierrezia linearifolia'' Lag. ]</ref> }} [[File:Gutierrezia microcephala 2.jpg|thumb|Flower heads of ''Gutierrezia microcephala'']]

'''''Gutierrezia''''' is a genus of flowering plants in the family Asteraceae, native to western North America and western South America.<ref name=FNA>{{citation |chapter-url=http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=114211 |title=Flora of North America |chapter=''Gutierrezia'' Lagasca, Gen. Sp. Pl. 30. 1816 |author=Guy L. Nesom |volume=20}}</ref> Plants of this genus are known generally as '''snakeweeds''' or '''matchweeds'''.<ref>Lagasca y Segura, Mariano. 1816. Genera et species plantarum, quae aut novae sunt aut nondum recte cognoscuntur, Elench. Pl. 30</ref><ref name="Tropicos, Gutierrezia Lag">[http://www.tropicos.org/Name/40018457 Tropicos, ''Gutierrezia'' Lag.]</ref><ref>{{cite web|title=Asteraceae of North America Update, database (version 2010.5.13)|url=https://www.itis.gov/servlet/SingleRpt/RefRpt?search_type=source&search_id=source_id&search_id_value=466|publisher=Integrated Taxonomic Information System|access-date=January 5, 2013}}</ref><ref>{{cite web|title=Gutierrezia Lag. Taxonomic Hierarchy|url=https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=37478|publisher=Integrated Taxonomic Information System|access-date=January 5, 2013}}</ref><ref>{{cite web|title=Classification for Kingdom Plantae Down to Genus Gutierrezia Lag.|url=https://plants.usda.gov/java/ClassificationServlet?source=profile&symbol=GUTIE&display=31|publisher=United States Department of Agriculture Natural Resources Conservation Service|access-date=January 5, 2013}}</ref><ref>Lane, M. A. 1985. Taxonomy of ''Gutierrezia'' (Compositae: Astereae) in North America. Systematic Botany 10(1): 7–28</ref> Some species have been called greasewood.<ref>{{cite wikisource |title=The New International Encyclopædia |chapter=Greasewood}}</ref> They are annual or perennial plants or subshrubs with yellow or white flowers.<ref name=FNA/>

These plants contain chemical compounds which can be toxic to livestock and some are considered weeds.<ref>{{Cite book |last1=Everitt |first1=J.H. |last2=Lonard |first2=R.L. |last3=Little |first3=C.R. |title=Weeds in South Texas and Northern Mexico |publisher=Texas Tech University Press |location=Lubbock |year=2007 |isbn=978-0-89672-614-7}}</ref>

; Species<ref name=r/><ref>[http://bonap.net/NAPA/TaxonMaps/Genus/County/Gutierrezia Biota of North America Program 2013 county distribution maps]</ref><ref>CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, México D.F.</ref><ref>[http://www.theplantlist.org/tpl1.1/search?q=Gutierrezia The Plant List, search for ''Gutierrezia'']</ref><ref name=powo>{{cite web|title=Gutierrezia|url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30011380-2 |website=plantsoftheworldonline.org|publisher=Royal Botanical Gardens Kew |access-date=2018-10-18}}</ref> * ''Gutierrezia alamanii'' - Chihuahua * ''Gutierrezia argyrocarpa'' - Hidalgo * ''Gutierrezia arizonica'' – Arizona snakeweed - Arizona, Sonora * ''Gutierrezia baccharoides'' - Chile, Argentina * ''Gutierrezia californica'' – San Joaquin snakeweed - California, Baja California, Arizona (Yavapai Co) * ''Gutierrezia conoidea'' - Chihuahua, Durango, Jalisco, Zacatecas * ''Gutierrezia dracunculoides'' - USA (from Arizona to Nebraska + Tennessee) * ''Gutierrezia dunalii'' - Morelos, México State * ''Gutierrezia elegans'' - Lone Mesa snakeweed * ''Gutierrezia espinosae'' - Chile * ''Gutierrezia gayana'' - Chile * ''Gutierrezia gilliesii'' - Argentina * ''Gutierrezia grandis'' - Nuevo León, Coahuila * ''Gutierrezia isernii'' - Argentina * ''Gutierrezia mandonii'' - Argentina, Bolivia * ''Gutierrezia microcephala'' – threadleaf snakeweed - southwestern USA, northern Mexico * ''Gutierrezia neaeana'' - Chile * ''Gutierrezia paniculata'' - Chile * ''Gutierrezia petradoria'' – San Pedro snakeweed - Utah * ''Gutierrezia pomariensis'' - Utah * ''Gutierrezia pulviniformis'' - Argentina * ''Gutierrezia ramulosa'' - Baja California * ''Gutierrezia repens'' - Argentina * ''Gutierrezia resinosa'' - Chile * ''Gutierrezia sarothrae'' – broom snakeweed - western Canada, western + central USA, northern Mexico * ''Gutierrezia sericocarpa'' - San Luis Potosí, Durango, Zacatecas, Guanajuato, Querétaro, Nayarit * ''Gutierrezia serotina'' – late snakeweed - Arizona * ''Gutierrezia solbrigii'' - Argentina * ''Gutierrezia spathulata'' - Argentina * ''Gutierrezia sphaerocephala'' – roundleaf snakeweed - USA (Arizona, New Mexico, Texas), northern Mexico * ''Gutierrezia taltalensis'' - Chile * ''Gutierrezia texana'' – Texas snakeweed - USA (New Mexico, Texas Oklahoma Louisiana Arkansas), Nuevo León * ''Gutierrezia wrightii'' – Wright's snakeweed - USA (Arizona, New Mexico), Chihuahua, Durango, Sonora

==References== {{Reflist}}

==External links== *{{Commons category-inline|Gutierrezia}} * [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,1273 Jepson Manual Treatment]

Category:Gutierrezia Category:Asteraceae genera Category:Flora of Northern America Category:Flora of Central America Category:Flora of western South America Category:Taxa named by Mariano Lagasca Category:Plant dyes