''Arnica rydbergii'' 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 Rydberg's arnica or subalpine arnica or subalpine leopardbane.
[Flora of North America, Rydberg’s arnica, ''Arnica rydbergii'']
/ref> It is native to western Canada ( Alberta, British Columbia), and the western United States ( Alaska, Washington, Oregon, Utah, Idaho, Montana, Utah, Wyoming, Colorado, South Dakota).
''Arnica rydbergii'' is an herb up to 35 cm (14 inches) tall. 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 ...
are yellow, with both ray florets and disc florets. It grows in alpine meadows
Alpine tundra is a type of natural region or biome that does not contain trees because it is at high elevation, with an associated harsh climate. As the latitude of a location approaches the poles, the threshold elevation for alpine tundra gets ...
and rocky slopes at high altitudes in mountainous areas.[Greene, Edward Lee 1899. Pittonia 4(20D): 36–37]
/ref>
The species is named for Swedish-American botanist Per Axel Rydberg
Per Axel Rydberg (July 6, 1860 – July 25, 1931) was a Swedish-born, American botanist who was the first curator of the New York Botanical Garden Herbarium.
Biography
Per Axel Rydberg was born in Odh, Västergötland, Sweden and emigrated to t ...
, 1860–1931.
References
External links
Southwest Colorado Wildflowers
photos of several species of ''Arnica''
rydbergii
Flora of Western Canada
Plants described in 1899
Flora of the Northwestern United States
Flora of Utah
Flora without expected TNC conservation status
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