Agoseris aurantiaca is a species of plant in the family
Asteraceae, commonly called orange agoseris or mountain dandelion. It is widespread in western North America.
Description
Agoseris aurantiaca is a perennial herb or subshrub[2] growing to 60 centimeters (24 inches) in height.[3] It produces a basal
rosette of leaves, which are 5–35 cm (2–14 in) long and entire or with irregular tooth-like lobes.[3] There is no stem, but it does produce several stem-like
peduncles. Between June and August, each peduncle bears a single
flower head 2.5 cm (1 in) in width,[3] surrounded by
glabrous to hairy
phyllaries. The head is ligulate, containing several
ray florets but no
disc florets. The florets are most commonly orange but are occasionally yellow, pink, red, or purple. "Aurantiaca" means "orange-red".[4]: 111 The flower head matures into a ball-like head of beaked
achenes, each with a terminal
pappus of numerous, white bristles.[5]
It is the only orange-flowered species in the genus, the others typically being yellow.[3]
^Cody, W. J. 1996. Flora of Yukon Territory i–xvii, 1–669. NRC Research Press, Ottawa.
^Hultén, E. 1968. Flora of Alaska i–xxi, 1–1008. Stanford University Press, Stanford
^Porsild, A. E. & W. Cody. 1980. Checklist of the Vascular Plants of the Northwest Territories Canada i–viii, 1–607. National Museum of Natural Sciences, Ottawa