''Arnica lanceolata'' is a

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

n species of flowering plant in the family Asteraceae, known by the common name clasping arnica or lanceleaf arnica. It has a disjunct ( discontinuous) distribution in western

and northeastern

. ''Arnica lanceolata'' is a perennial herb usually growing from a small

rhizome In botany and dendrology, a rhizome (; , ) is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow hori ...

and producing one or more hairy, glandular stems. The stems are lined with 5 to 10 pairs of oval-shaped, toothed leaves up to 12 centimeters long. The inflorescence is a cluster of several daisy-like

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 ...

with a center of brownish disc florets and a fringe of yellow ray florets 1 to 2 centimeters long. The fruit is a cylindrical

achene An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and indehiscent (they do not ope ...

covered in hairs and with a light brown pappus at one end. It grows in moist areas, along stream banks, and montane to alpine meadows. ;Subspecies * ''Arnica lanceolata'' subsp. ''lanceolata'' - Quebec, New Brunswick, Maine, New Hampshire, Vermont,

New York New York most commonly refers to: * New York City, the most populous city in the United States, located in the state of New York * New York (state), a state in the northeastern United States New York may also refer to: Film and television * '' ...

* ''Arnica lanceolata'' subsp. ''prima'' (Maguire) Strother & S.J.Wolf - 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. ...

, Alberta, British Columbia, Washington, Oregon, California, Idaho, Montana, Utah, Wyoming, Nevada

References

External links

Go Botany, New England Wildflower Society
description and ecological information with photos lanceolata Flora of Subarctic America Plants described in 1841 Flora of the Northwestern United States Flora of the Southwestern United States Flora of the Northeastern United States Flora of Eastern Canada Flora without expected TNC conservation status {{Asteroideae-stub