Hymenoxys grandiflora | |
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Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Asterales |
Family: | Asteraceae |
Genus: | Hymenoxys |
Species: | H. grandiflora
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Binomial name | |
Hymenoxys grandiflora | |
Synonyms[1] | |
Synonymy
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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.
H. grandiflora is a perennial herb up to 30 centimeters (1 foot) tall. The leaves are 7.5–10 cm (3–4 in) long.[4] The plant generally produces one flower head per stem, up to 10 per plant, present between June and August.[4] Each head has 15–44 ray flowers and 150–400 disc flowers.[5] The seeds are five-sided with narrow scales at the tip.[4]
The species has the largest flowers of any in its genus, hence the specific epithet grandiflora (large-flowered).[4]
The plant 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.[6][7] It can be found on rocky slopes, meadows, and tundra environments.[4]