Erigeron compositus

Erigeron compositus is an Arctic and alpine species of fleabane in the daisy family.[3] Common names include dwarf mountain fleabane, cutleaf daisy, and trifid mountain fleabane.[4][5]

Dwarf mountain fleabane
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Astereae
Genus:	Erigeron
Species:	E. compositus
Binomial name
Erigeron compositus Pursh
Synonyms[1]
Erigeron compositum Pursh[2] Cineraria lewisii Richardson Erigeron gormanii Greene Erigeron multifidus Rydb. Erigeron pedatus Nutt.

Erigeron compositus has been found in the Russian Far East (Wrangel Island and Chukotka), Alaska, Greenland, much of Canada (all 3 Arctic territories plus British Columbia, all 3 Prairie Provinces, Quebec, Newfoundland, and Nova Scotia), and the western United States (from the Pacific Coast as far east as the Dakotas, Colorado, and New Mexico).[3][6]

Erigeron compositus is perennial herb rarely more than 25 cm (10 in) tall. It produces a taproot and spreads by means of horizontal underground rhizomes. A plant generally produces only one flower head per stem, each head with 20–60 white, pink or blue ray florets, these sometimes small and easily mistaken for disc florets. Genuine disc florets are yellow and in the center of the head.[7]

References

1. The Plant List, Erigeron compositus Pursh
2. Tropicos, Erigeron compositus Pursh
3. S.G. Aiken, M.J. Dallwitz, L.L. Consaul, C.L. McJannet, R.L. Boles, G.W. Argus, J.M. Gillett, P.J. Scott, R. Elven, M.C. LeBlanc, L.J. Gillespie, A.K. Brysting, H. Solstad, and J.G. Harris 2007. Flora of the Canadian Arctic Archipelago, Erigeron compositus Pursh
4. http://plants.usda.gov/java/profile?symbol=erco4
5. Pan-arctic flora, 860701 Erigeron compositus Pursh
6. Biota of North America Program 2014 state-level distribution map
7. Flora of North America, Erigeron compositus Pursh, Fl. Amer. September 2: 535. 1813. Dwarf mountain fleabane, vergerette à feuilles segmentées