| Hymenoxys ambigens | |
|---|---|
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| Hymenoxys ambigens var. neomexicana | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Hymenoxys |
| Species: | H. ambigens
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| Binomial name | |
| Hymenoxys ambigens | |
| Synonyms[1] | |
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Hymenoxys ambigens is a species of flowering plant in the daisy family known by the common name Pinaleño Mountains rubberweed. It is native to the states of Arizona and New Mexico in the southwestern United States.[2][3]
Hymenoxys ambigens is a perennial herb up to 150 cm (5 feet) tall. Leaves have very narrow lobes resembling branching threads. One plant can produce an array of 25–400 small yellow flower heads, each head with 3-5 ray flowers and 6–15 disc flowers.[4][5]
- Hymenoxys ambigens var. ambigens - Mescal, Pinaleño, and Santa Teresa Mountains in Arizona
- Hymenoxys ambigens var. floribunda (A.Gray) W.L.Wagner - Chiricahua, Dos Cabezas, Dragoon, Little Dragoon, and Mule Mountains in Arizona
- Hymenoxys ambigens var. neomexicana W. L. Wagner - Animas + Peloncillo Mountains in New Mexico
- ^ a b The Plant List, Hymenoxys ambigens (S.F.Blake) Bierner
- ^ Biota of North America Program 2014 distribution map
- ^ SEINet, Southwestern Biodiversity, Arizona chapter description, photos, distribution map
- ^ a b Flora of North America, Hymenoxys ambigens (S. F. Blake) Bierner, 1994. Pinaleño Mountains rubberweed
- ^ Blake, Sydney Fay 1929. Journal of the Washington Academy of Sciences 19(13): 276–278 description and commentary in English, full page of line drawings on page 277