Hymenoxys grandiflora is a North American species of flowering plant in the daisy family known by the common names graylocks four-nerve daisy, graylocks rubberweed, or old man of the mountain.[1] 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 NaNcm (-2,147,483,648inches) long.[2] The plant generally produces one flower head per stem, up to 10 per plant, present between June and August. Each head has 15–44 ray flowers and 150–400 disc flowers.[3] The seeds are five-sided with narrow scales at the tip.
The species has the largest flowers of any in its genus, hence the specific epithet grandiflora (large-flowered).
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.[4] [5] It can be found on rocky slopes, meadows, and tundra environments.
