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Gutierrezia is a genus of flowering plants in the family Asteraceae, native to western North America and western South America.[4] Plants of this genus are known generally as snakeweeds or matchweeds.[5][1][6][7][8][9] Some species have been called greasewood.[10] They are annual or perennial plants or subshrubs with yellow or white flowers.[4]
These plants contain chemical compounds which can be toxic to livestock and some are considered weeds.[11]
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. Plants of this genus are known generally as snakeweeds or matchweeds. Some species have been called greasewood. They are annual or perennial plants or subshrubs with yellow or white flowers.
These plants contain chemical compounds which can be toxic to livestock and some are considered weeds.
Species 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