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
