Hymenoxys grandiflora

Hymenoxys grandiflora is a North American species of flowering plant in the daisy family known by the common names graylocks four-nerve daisy,[2] graylocks rubberweed, or old man of the mountain.[3] It is native to high elevations in the Rocky Mountains of the western United States, in the states of Montana, Idaho, Wyoming, Utah, Colorado, and New Mexico.[4][5]

Hymenoxys grandiflora
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Hymenoxys
Species:
H. grandiflora
Binomial name
Hymenoxys grandiflora
(Torr. ex A.Gray) K.F.Parker 1950
Synonyms[1]
Synonymy
  • Actinea grandiflora (Torr. & A.Gray ex Torr. & A.Gray) Kuntze
  • Actinella grandiflora Torr. & A.Gray 1845
  • Cephalophora grandiflora (Torr. & A.Gray) Walp.
  • Ptilepida grandiflora (Torr. & A.Gray) Rose
  • Rydbergia grandiflora (Torr. & A.Gray ex Torr. & A.Gray) Greene
  • Tetraneuris grandiflora (Torr. & A.Gray ex Torr. & A.Gray) K.F.Parker

Description

Hymenoxys grandiflora is a perennial herb up to 30 cm (1 foot) tall. One plant generally produces one flower head per stem, up to 10 per plant. Each head has 15–44 ray flowers and 150–400 disc flowers.[6]

References

  1. The Plant List, Hymenoxys grandiflora (Torr. & A.Gray ex Torr. & A.Gray) K.F.Parker
  2. USDA, NRCS (n.d.). "Tetraneuris grandiflora". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 9 December 2015.
  3. "Old man of the mountain - Hymenoxys grandiflora". Colorado Plant Database. Colorado State University Extension, Jefferson County. Retrieved 25 March 2020.
  4. Biota of North America Program 2014 distribution map
  5. SEINet, Southwestern Biodiversity, Arizona chapter description, photos, distribution map
  6. Flora of North America, Hymenoxys grandiflora (Torrey & A. Gray) K. F. Parker, 1950. Graylocks rubberweed, four-nerved daisy

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