''Erigeron yukonensis'' is a rare Arctic species of flowering plant in the family Asteraceae known by the common name Yukon fleabane. It is native to the northwestern corner of North America: Alaska, Yukon,

Northwest Territories The Northwest Territories (abbreviated ''NT'' or ''NWT''; french: Territoires du Nord-Ouest, formerly ''North-Western Territory'' and ''North-West Territories'' and namely shortened as ''Northwest Territory'') is a federal territory of Canada. ...

.Biota of North America 2014 state-level distribution map
/ref> ''Erigeron yukonensis'' grows in rocky slopes and meadows, usually above the tree line. It is a branching perennial herb up to 40 centimeters (16 inches) tall, producing a taproot and a woody underground

caudex A caudex (plural: caudices) of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.pages 456 and 695 In the strict sense of the term, meaning a stem, "caudex" is m ...

. It generally produces 1-4

flower heads A pseudanthium (Greek for "false flower"; ) is an inflorescence that resembles a flower. The word is sometimes used for other structures that are neither a true flower nor a true inflorescence. Examples of pseudanthia include flower heads, compos ...

per stem. Each head contains 42–82 pink, purple, or white ray florets surrounding numerous yellow disc florets.Flora of North America, ''Erigeron yukonensis'' Rydberg, 1901. Yukon fleabane
/ref>

References

yukonensis Flora of the Arctic Plants described in 1901 Flora of Alaska Flora of Yukon Flora of the Northwest Territories Flora without expected TNC conservation status {{Erigeron-stub