Hymenoxys
Hymenoxys is a genus of plants in the sunflower family, native to North and South America. It was named by Alexandre [Henri Gabriel de Cassini] in 1828.
Plants of this genus are toxic to sheep due to the presence of the sesquiterpene lactone hymenoxon.
; Species
- Hymenoxys ambigens - Pinaleno Mountain rubberweed - Arizona New Mexico
- Hymenoxys anthemoides - Rio Grande do Sul, Rio de Janeiro, Paraguay, Uruguay, Argentina
- Hymenoxys biennis - Utah
- Hymenoxys bigelovii - Utah Arizona New Mexico
- Hymenoxys brachyactis - East View rubberweed - New Mexico
- Hymenoxys brandegeei - Arizona New Mexico Colorado
- Hymenoxys cabrerae - Argentina
- Hymenoxys californica - California, Baja California
- Hymenoxys chrysanthemoides - San Luis Potosí, Veracruz, Zacatecas, México State, Puebla, Oaxaca, Hidalgo
- Hymenoxys cooperi - Cooper's rubberweed - California Nevada Arizona Utah Idaho Oregon New Mexico
- Hymenoxys grandiflora - New Mexico Colorado Wyoming Montana Utah Idaho
- Hymenoxys helenioides - intermountain rubberweed - Arizona New Mexico Colorado Utah
- Hymenoxys hoopesii - owl claws - New Mexico Colorado Wyoming Montana Utah Idaho Oregon Nevada California
- Hymenoxys insignis - Nuevo León, Coahuila, Chihuahua
- Hymenoxys jamesii - Arizona
- Hymenoxys lemmonii - Lemmon's rubberweed - Arizona Oregon Nevada California
- Hymenoxys multiflora - Texas New Mexico
- Hymenoxys mutica - California
- Hymenoxys odorata - bitter rubberweed - California Arizona New Mexico Texas Oklahoma Colorado Kansas Maine South Carolina Alabama, Baja California, Baja [California Sur], Sonora, Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Tamaulipas
- Hymenoxys quinquesquamata - rincon rubberweed - Arizona New Mexico
- Hymenoxys richardsonii - pingue rubberweed, Colorado rubberweed - Alberta, Saskatchewan, Montana Idaho Wyoming Utah Colorado New Mexico Arizona Texas Nebraska North Dakota Nevada
- Hymenoxys robusta - Bolivia, Argentina, Peru
- Hymenoxys rusbyi - Arizona New Mexico
- Hymenoxys subintegra - Arizona rubberweed - Arizona Utah
- Hymenoxys texana - prairie dawn - Texas
- Hymenoxys tweediei - Argentina
- Hymenoxys vaseyi - Texas New Mexico