Hymenoxys ambigens

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
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Genus:
Hymenoxys
Species:
H. ambigens
Binomial name
Hymenoxys ambigens
(S.F.Blake) Bierner 1994
Synonyms[1]
  • Plummera ambigens S.F.Blake 1929
  • Hymenoxys microcephala (A.Gray) Bierner
  • Plummera floribunda A.Gray

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]

Varieties[1][4]

History

In 1882, Sarah Plummer Lemmon discovered the species. Harvard University botanist, Asa Gray, first described the species, naming it Plummera floribunda in her honor.[6][7][8] Plummera was redefined as a subgenus of Hymenoxys in 1994.[9]

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References
  1. The Plant List, Hymenoxys ambigens (S.F.Blake) Bierner
  2. Biota of North America Program 2014 distribution map
  3. SEINet, Southwestern Biodiversity, Arizona chapter description, photos, distribution map
  4. Flora of North America, Hymenoxys ambigens (S. F. Blake) Bierner, 1994. Pinaleño Mountains rubberweed
  5. 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
  6. "Sara Plummer Lemmon: Pioneering Botanist | JSTOR Daily". JSTOR Daily. 2015-03-11. Retrieved 2016-12-13.
  7. Dupree, A. Hunter (1988). Asa Gray, American Botanist, Friend of Darwin. Baltimore, MD: Johns Hopkins University Press. pp. 389, 397–398. ISBN 978-0-801-83741-8.CS1 maint: ref=harv (link)
  8. Ogilvie, Marilyn Bailey; Harvey, Joy Dorothy (2000-01-01). The Biographical Dictionary of Women in Science: L-Z. Taylor & Francis. ISBN 9780415920407.
  9. Bierner, Mark W 1994 SUBMERSION OF DUGALDIA AND PLUMMERA IN HYMENOXYS (ASTERACEAE: HELIANTHEAE: GAILLARDIINAE) Sida, Contributions To Botany Volume: 16:1-8


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