Erigeron filifolius

Erigeron filifolius is a North American species of flowering plants in the daisy family known by the common names thread-leaf fleabane.[4]

Erigeron filifolius
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Astereae
Genus:	Erigeron
Species:	E. filifolius
Binomial name
Erigeron filifolius (Hook.) Nutt.
Synonyms[1]
Erigeron filifolium (Hook.) Nutt.[2][3] Chrysopsis canescens DC. Diplopappus filifolius Hook. Diplostephium filifolium (Vent.) Nees Diplostephium teretifolium (Less.) Nees

Erigeron filifolius is widespread across much of western North America. It has been found in western Canada (British Columbia) and the western United States (primarily the Cascades of Washington, Oregon, and northern California with additional populations in northern Nevada, Idaho, northwestern Montana, and northern Utah).[5][6]

Erigeron filifolius is a branched perennial herb up to 50 centimeters (20 inches) in height. Leaves are long and thin, often thread-like, up to 8 cm (3.2 inches) long. Each stem sometimes produces only 1 flower head per stem, sometimes flat-topped clusters of 10 or more. Each head may contain as many as 125 white, blue, pink, or lavender ray florets surrounding numerous yellow disc florets.[4]

References

1. The Plant List, Erigeron filifolius (Hook.) Nutt.
2. Tropicos, Erigeron filifolius (Hook.) Nutt.
3. Nuttall, Thomas 1840. Transactions of the American Philosophical Society, new series 7: 308 as Erigeron filifolium
4. Flora of North America, Erigeron filifolius (Hooker) Nuttall, Thread-leaf fleabane
5. Biota of North America Program 2014 county distribution map
6. Calflora taxon report, University of California, Erigeron filifolius (Hook.) Nutt., threadleaf fleabane